The hbl doesn't have anything interesting really. On your firmware, you can't pirate games, or run ds games, or use most of the useful homebrew applications. For that you need a CFW (Custom FirmWare). Getting one of those on your firmware is impossible unless you have one of these:
1. a second 3ds on a lower firmware and/or already modded
2. a hardmod (costs about 100 dollars to get unless you can solder)
3. an acekard 2i along with either a powersaves or second modded 3ds
if you want basic homebrew though, without all the cool features, there is still a bit of cool things to do. You can play rom hacks, run simple homebrew applications, play regionfree games, and run a select few emulators, mainly nes and snes. To get basic homebrew, you need one of the following:
1. a copy of cubic ninja
2. 2. a copy of freakyforms (cartridge)
3. a copy of oot3d along with a powersaves
4. the smash 3ds demo and a computer running linux capable of making a wifi beacon (very impractical, i suggest using this along with a secondary entrypoint)
There are many other exploits for the basic homebrew launcher that require a second 3ds and a game, but by that point, you can just the second 3ds to hook yourself up with a cfw. There are no workarounds to what i have posted here. These are ALL of your options. Hope this made things clear.
EDIT: i also did not include doodle bomb since it was patched, and the op would not be asking for access to the hbl if they already had a doodlebomb.