Welcome @thereisners! If you do decide you have the time and inclination to go down the Flex route, start with ‘Fixed’ while you figure out your settings, and maybe start with just one zone on Flex to get a feel for it. Here’s a potential starting point.
With regards to irrigation I was in a similar spot as you last year and the great folks here helped me tune up my system. After the learning here it wasn’t a big deal, and didn’t cost more than new replacement heads and some of my time on a Saturday afternoon. @robertokc is definitely the resident expert on irrigation on this forum!
What part of the country do you live in ? A lot of our recommendations will vary based on climate.
