I'd also suggest getting enough stats for the first rank of Soul Arrow (I forget what you need, sorry!). As it'll make some of the bosses a lot easier (should you struggle with any of the melee bosses).
Just echoing what everyone else has said so far, just keep at it, you'll get better, even if it isn't noticeable at first. While fundamentals do kinda carry across most games, I'd suggest sticking to one to begin with?
I started a blog on this site about me starting to learn Blazblue for the first time (as I loved how that game felt), with videos and write ups of my utter failure. After a couple of months I was able to compare more recent games to my first games and note clear improvement (even if I was still garbage compared to most people online...). What I'm trying to say is I found it less depressing if I documented how I was doing, as it was easier to track improvement that way. Unless you don't improve at all I suppose, then it's probably more depressing, don't know where I was going with this...
I can thoroughly recommend both Danganronpa and it's sequel as you suggested. As well as Vita version of Virtue's Last Reward when you finally get through 200+ hours of RPG you've just bought yourself.