Hello hello! For starters, note that we'll be switching to the 2.0 rules around June/July this year, so make sure you take a look at not only the 1.3 rulebook, but also check the 2.0 packet for changes that are coming. I'll try to keep in mind that you're likely only familiar with the 1.3 rules right now, and make note of 2.0 changes if I think they'll impact your character.
There isn't really a set of stats listed for Humans because they're the only race that doesn't really 'get anything'; they have no particular costuming requirements, but they also don't get any Racial benefits like Resists or skill cost reductions. As a Human, you'll have the standard 10 Body, and 25 BP (XP in 2.0) to spend on your starting skills; anything else (backstory, behaviour, etc.) is all up to you, but check with your chapter in case they have particular restrictions you should be aware of.
So, first tip: If you know your end goal is to go for an Adept, start either Rogue or Scholar. You can change class at any point in future so long as you have enough XP to cover the costs of all your current skills; since skills are cheaper for the 3 'pure' classes (Fighter, Rogue, and Scholar) than for the 'hybrid' classes (Adept, Scout, and Spellsword), you'll get more bang for your buck by starting as a Rogue or Scholar and switching to Adept later down the road. My personal recommendation is to go Rogue first, get your Rogue skills to a point you're happy with, and then start learning magic; Rogue skills (Stealth skills in 2.0) tend to be more expensive per purchase than spell slots, and you gain XP fast enough early on that you can get a decent base or Rogue skills before your XP gains per game slow down significantly (around level 10-12).
Second tip: Pick one school of magic (Earth or Celestial) and stick with it, especially when first learning magic. Your primary school is fairly cheap to gain spell slots in, but your secondary school is double the cost of your primary school. Because of how spell pyramids work, you'll tend to get more spells overall by focusing on one rather than trying to divide your XP between both.
Third tip: Don't try to be a Jack of All Trades; specializing in a few things is generally better overall than trying to be average at everything. You already know you want to go Adept, so focus slightly more heavily on either the Rogue side or the Scholar side of that, rather than trying to keep them even; especially while you're building up your skills (pre-level 20), you'll probably find you prefer one side to the other, so sink XP there to support a fun game for yourself before heavily investing in the other.
As far as starting builds go, there are a couple of different ways to go...
A weapon skill of some kind is the best place to start, so for a Rogue I recommend starting either One-Handed Edge or Archery: Archery requires you to spend in-game coin on Arrows or Bolts, but you can attack from range which can be a life saver when you're just starting out, and also gets +1 damage from any angle with Back Attacks and Backstabs, plus if you use a Bow instead of a Crossbow you can use the Bow to block; One-Handed Edge doesn't require any ammunition, but you'll be in the middle of combat, and only get bonus Back Attack or Backstab damage while behind your target.
Once you've got your weapon skill tackled, look at purchasing a Backstab; in 2.0 your first will cost you 9 XP as a Rogue, so you'll have about 10 XP left. That's not enough to buy another Backstab, but you could buy the 3 Back Attacks required for the second with maybe 1 or 2 XP left over, or you could look into getting a bit of a head start on the magic side of things and get Educated (replaces Read and Write in 2.0), which will leave you with about 4 XP.
If you go for Back Attacks and have 2 XP left, consider taking a rank of Craftsman for 2 XP, as it gives you a silver per logistics period per rank, and it can help flesh out your character; if you went the Educated route, take First Aid if you want to go into Earth magic, or a Back Attack if you want to go for Celestial. If you don't know which school you want to go for, you can't really go wrong with a Back Attack; if you want to go into Alchemy, take Herbal Lore.
This is probably a bit overwhelming to just read, but it'll be a little easier to understand if you play around with the builder here:
https://docs.google.com/spreadsheets/d/1ltd5NAB6qpoSNs68gXF6hydwpBdpKmF17vQy2QylExg/edit?usp=sharing (Credit to Cedric!)
Note that this builder is for 2.0; if you're having trouble with it, either reply here or you can message me directly and I'll do what I can to help. If you'd prefer some in-person help with it, contact your local chapter and try to meet up with either their new player rep or someone on the logistics team, and they should be able to help you out.

Hope this helped!