Resentment is a sign you are giving too much and are in need of replenishment. It’s a good example of how even the “negative” emotions are on your side, interpreting your experience in the world.
Practice “doing without” (or “going without.”). Even young kids can learn the concept. Nobody get everything they want. Sometimes it’s harder than others, but it’s not the end of the world when we have to do without something we want.
Once or twice a year my parents would clean all the walls and baseboards in the house. Every time I smell Murphy’s Oil Soap I think of that. They mostly separated work around traditional gender roles but only insofar as that’s what they liked. Mom had no desire to work in the yard, Dad didn’t like to cook (until he got a bread machine for his retirement!) They often worked together on big tasks no matter inside or outside. Teamwork! And clean walls.
No one is ever really ready to be a parent. It’s definitely on the job training!
But I’ll say this: If you’re prepared to put your family’s needs before your own, you’re as ready as anyone can be.
Sometimes the job will require you to do menial tasks. Do them enthusiastically because nothing is “beneath you.” If the good Lord can wash people’s feet, you can make coffee at the office. Get over yourself.
“What do you think about keeping things PG-rated for a while? We’re both just figuring stuff out. The last thing I’d want to do is hurt you.” Or whatever spin you want to put on the idea that there’s no rush, and plenty of amazing sensations to experience and explore, long before things go further than kissing. Hang out in that PG range as long as possible. And if you can’t talk with your partner about that then you probably shouldn’t be having sex anyway.
Turn on the closed captions on tv. Reading them is almost unconscious. Even better, set the audio to a language other than English and turn on English captions.