Well, you already got a lot of good ideas here.
I’ll add a thumbs up to the playing songs you like.
Basically, I find that playing a song I really like is kind of an excuse to listen to a song I really like over and over again. It becomes very meditative.
As to how to bring yourself to actually, physically pick up the bass and start playing, Josh has a section about it in the beginning of B2B:
Make sure your space is all ready to go - bass always plugged in, not in a case, not away under the bed etc.
You said " sometimes even the idea of plugging everything in…" which suggests that there are some steps to take which prevent you from getting started. Try to lower those barriers.
If you play with headphones connected to the amp - leave your bass plugged in and the headphones plugged in. Get a chair to stay next to the amp/bass with the headphones on the chair - all ready to go, just sit and play.
etc etc based on your space. If you don’t actually have a space, make one!
I’ve seen from the videos posted in this forum that some members live is pretty small apartments, but they have a small corner dedicated to this hobby. It really only takes one meter square to have a guitar stand and an amp.
Now, while I am far from being a “counseling” kind of person, also talk to your partner about it. I find that sometimes I don’t get started because there is so much to do in the house that I feel guilty for playing while I know my wife is cleaning the kitchen (for example).
After a few years of this going on (I also didn’t play for a long time), we had some chats and she understands that I want playing the bass to be a part of my life, that it is my yoga/gym or whatever you want to call this “wellness” time.
I sometimes build it into our daily touch points. i.e: “Honey, I’ll finish the kids lunches and sending them to school, clean the kitchen and then I’m going to disappear for 20 minutes playing my bass, ok?” . Sound silly, but it gives me this internal lack-of-guilt to go and play.
Also, our partners are supposed to help and motivate us to chase our (little) dreams. If they don’t know it’s important to us they can’t do it. When they do, it’s just like your partner helping you with reminder to go to the gym, maybe s/he can help you with encouragements to practice.
And in the end, while it sounds defeatist, sometimes you just can’t fit more in your life. My father-in-law passed away 2.5 years ago and we had a whirlwind of moving my MIL in with us (she has dementia) and then caring for her and two kids. I just didn’t play for a year plus at this point… such is life sometimes.
I have so many hobbies I want to make time for but I just don’t. I have 2 3D printers at home that I haven’t touched in 2 years, I have an indoor hydroponic grow system for plants I haven’t used in 3 years. I want to train crossfit and I always wanted to learn BJJ…
Life now is raising two kids, working shift work full time, and trying to get 20 minutes of bass in. And I came to be at peace with it.