[quote=@BigPapaBelial]
[@CaptainManbeard]

I suppose a compromise is, he's got some knowledge of Goblin locks. Not fantastically quite yet maybe? Say enough to work at it.

But those Goblin locks are going to take a little longer to work through let's say. He still has to carefully step his way through it, Every Goblin lock is a learning experience. But with every Gobby lock he learns something new or gets to hone what he knows and gets better everytime.

I mean 38 is plenty of time to learn true. But it's still lots of time to learn and get better.

As for lots of students fighting during the BAttle of Hogwarts. You know the real implications right? Lots of Firsties fought...without any combat spell knowledge. Alot of them would have died because they didn't know how to cast anything more then MAYBE [b]MAYBE[/b] [u][i]MAYBE[/i][/u] an Expelliarmus. 3rd year and up they have more experience with casting Reducto, and other combat spells. The 3rds and up would have had more likely chances to survive. But alot of 1sts and 2nds. Not so sure. So alot of those Firsties and Seconds? May have died during the BoH...

Makes ya think huh?
[/quote]

Well, Harry did have those private DA classes he taught in 5th year, and some of that knowledge may have been passed down. Plus the entire school year leading up to the BoH, dark wizards were influencing Hogwarts classes, they even taught them Dark Arts and forced students to cast Unforgivable Curses against each other. But even before that, they had Defence Against the Dark Arts classes, and we can take a look at Harry and Draco's duel in 2nd year to get an idea. 

[center][youtube]https://youtu.be/0Dj2kq5Neus?si=YrK6m0JwwLMn9T9S[/youtube][/center]

As for your character, we can see how it all plays out once we get the RP going, but your character should be prepared for much more than simple safecracking, given that they'll be going up against fellow magical criminals and dark wizards who play dirty XD.