You've come to the right address lol

I'm autistic too with no prior experience with Battle Network-style gameplay and my reflexes aren't the best either (I can panic and make mistakes easily), but I still beat the final boss on the second attempt with little to no grinding, just playing the game with that ROM patch and doing all the sidequests. Haven't done much of the post-game yet though.

The first Star Force game is rather easy compared to Battle Network before it, the patch even includes a custom hard mode you can turn on and off whenever you want, as lack of difficulty was a common critique among fans.

In short: it's very doable, however things can get overwhelming with three or more enemies at once.

As for the story: a common opinion I've seen is that the Battle Network series has better gameplay, while Star Force (except 2, which fumbled it) has some of the best writing in the Mega Man franchise. The following bit is personal, so it may not hit you as hard as me.

The MC's character growth has unironically been inspirational for me; the game's aesthetic, theming and music fully understood me in the worst period of my life. It reminded me of what I want to be and do in a time where I felt hopeless about overcoming anxieties and incapacities. It made me believe in myself again. I haven't been the same person since, and while I still fall in familiar pitfalls and still have anxieties about self-image and competence, I feel like now I'm truly growing up. (I'm 20 years old and studying)