Need advice with RPG making
You don't have the bandwidth, skill level, team size, money, or time to make an RPG. Those generally take teams of a hundred-plus professional game developers multiple years of full-time-plus work to make.
There's a reason you see so few indie RPGs and the few you do find are almost solely made by established RPG developmers.
Uh... Markets are overflowing with indie RPGs...
I think you have to qualify both of these statements. The first is very true if you try to compete with the AAA RPGs on content, although this is equally true in most game genres. The second of these statements is true if we're realistic about the scope of indie RPGs.
I would say, in general, that rather few 'indie' games provide more than about 10 hours of content unless they're either relying on procedural content, or are particularly well-funded and well-staffed for an "indie" studio. There are a few exceptions, but I'm hard-pressed to think of any who exceed the ~10 hour mark by double or more.
OP isn't going to compete with Bard's Tale on content or quality anytime soon -- not alone, or even in a small group; but a similarly styled game with with a more focused scope and reasonable expectations for content polish is doable alone or in a small group, if you have dedication and sufficient time.