Have a conversation with him, go to a pub and have 'the talk'!
The one where you say you aren't used to sharing your space all the time, and aren't adjusting very quickly. That you are used to having personal time, as well as family time, and are finding it hard to take him into account all the time. That having made your own decisions about everything for years, having him suggesting things all the time is really disconcerting.
There's room for change on both sides, here.
Suggest having a planning time- that you talk in the evening about what to do tomorrow, or that Wednesdays you do your own thing, Fridays you do something together, other days you play by ear.
Just having the conversation and having a few strategies will defuse a lot of it. It will help you understand the roots of your irritation with him.
It may be partly hormonal, but it's a big adjustment.
Not unlike the lockdowns. Some people were very isolated, but many more were on top of each other all the time and drove each other mad!