I too was thrown off by high gears closure, right around this time last year. Tried urban cyclery in e. Orange and I would recommend. I took my bike in a couple times, once for a tune up once for a repair — solid, reasonably priced service, friendly knowledgeable staff, and quick turnaround time.
I too was pleased with Urban. Free pickup and delivery as well, I believe.
Working on bikes is easy and satisfying. Have a look here: https://www.parktool.com/blog/repair-help and note that they make tools, so they may recommend more specialized tools than what you really need.
Promote your business here - Businesses get highlighted throughout the site and you can add a deal.
bought all our bikes at high gear bc of the free basic service. Hilltop quoted me something like $130 (if I recall) per bike. Just looking to get get family bikes running well for summer.
Any advice on how/where to bring or learn DIY? Lost. Without high gear.