Starting hacking anew

What kind of ROM hacking I want to learn out of this:

-Text hacking for now, since it's probably the least difficult hacking to start with out of all other difficult aspects of ROM hacking.
- After that, probably music hacking, but that is known to be extremely time-consuming and games are very picky about what's assigned to what.

It's only a suggestion but you should tackle ASM right away. It's where you will learn the most and you can apply that knowledge to other games after. Here's 2 good references:

http://www14.brinkster.com/assassin17/thegun.htm
http://www.defence-force.org/computing/o.../annexe_2/

Events are quite fun too. As for text hacking, anyone can use a table and change text, you won't learn much but if it's your thing go for it. Music hacking is very time consuming. MML song import is another alternative, you should google that in the japanese web.