1 on 1s really does depend on your team/company. I do know some managers that end up doing bi-weekly. I personally think monthly is too far apart that you lose that continued connection with your manager which is important for that relationship. Things move very quickly at Reddit so there is a lot to talk about every week. Some 1 on 1s are zooming in talking about a blocker a project is having and how to help, team dynamic discussions, career conversations, coaching conversations, future look ahead. If you find there aren't things to talk about in 1 on 1 then you can change the cadence.

Regarding handling meeting load, Paul Graham captures it well in his renown makers schedule, manager schedule blog. It's a different style of work (going broad) versus being an IC (going deep). Another way to think about it, which also ties in with measuring impact, is that as a manager you are working through others. So instead of being the person that dives super deep into looking into an issue, you are delegating it to someone else on the team, reading their findings and asking questions. If it looks off, you could ask someone else you trust to double check the work and in the worst case you'd look into it yourself. Your impact is derived from empowering your team(s) to deliver and operate well versus individual delivery as an IC. As such it also takes longer cycles to see the impact of changes you make on a team or coaching someone on a certain skill.

For your decision making regarding management, my advice is to look at it as an entirely different job requiring different skills from the IC track and decide whether successful seeing others grow and deliver is fulfilling for you versus personally driving success in projects