As for making schedules, I would say do it if you want to, but do not punish yourself with it. Like the game itself there can be work and less enjoyable parts to it, but the point is to have it be a net positive experience.
The schedule upload list at
https://forums.ootpdevelopments.com/...d.php?t=324385 has some options for your league structure. This in particular is somewhat newer and might be close to what you want -
https://forums.ootpdevelopments.com/...60&postcount=4.
But maybe your "whatever works" becomes wanting some specific things not really in anything existing. By all means go as far as you like making something yourself, though just asking for something is always fine. Maybe not quickly, but requests are often filled.
Another sticky thread in this forum section gives a how-to mostly from one person's perspective:
https://forums.ootpdevelopments.com/...d.php?t=253597. There is a link in that to my blog (that term should indicate how long ago I started it) that has info on how I do things.
https://makingbaseballschedules.blogspot.com/
Making schedules is a niche skill, not for everyone for any number of reasons. As those previous links may show it does not have any single way or technique to do it. Practice tends to improve it. Some people will be better, and some may never have it click. I can juggle numbers around pretty well to make schedules, and I have made myself various tools toward that end. But, e.g., art is not my thing, and I cannot put curve on my bowling throws.
I will say that league structure as a good one for learning because it is full of even and consistent numbers that make it easy to connect teams into matchups. Those links will go into more detail. If you are okay with something very mathematical it is easy to have all teams playing either division, interdivision, or interleague games at the same time. E.g., division games can always be simultaneous 1v2 & 3v4, 1v3 & 4v2, or 1v4 & 2v3.
The process can become as complicated as you let it. Numbers of games against various opponents and the home/away breakdown of the games is generally the starting point. That is the basic, but the spice can be in getting games to fall on days in a certain way, distributing offdays, having doubleheaders, making the distribution of games less (or more) mathematical, constraining homestands/roadtrips, etc.