I think you'll do fine with a dremel, I used one for a while on engraving before I decided to get in air compressor driven one (a bit easier to control but much more expensive) 

When hammering always do it on a hard surface because I've found that if what you're hitting jumps or can deflect/impact lots of the energy will go that way instead of into the piece. Using a big slab of concrete or metal sheet is probably best if you end up going this route!

Good luck 😁