What steps should I take first to assure my own wellbeing now that I've moved my elderly father into my house?

My mom is also pretty pleasant, but her constant pain complaints can drive me batty.And she want me to sit with her and watch TV all the time. Luckily my Aunt takes her for a 2 weeks several times a year, and one year a cousin took them both for 6 weeks. So get your "break time' set up ahead of time,, you will need it.

Do you have a support system, such as children, sibs or close friends who would come in occasionally to give you a break? One of the most frequent issues we read about here is that the caregiver feels they are “joined at the hip” with the person they are caring for. They need time away, but because they have no support from anyone, a break is not possible and they begin to resent their person. If you have no one, you may want to accustom Dad to the fact that on occasion, a “friend” ( a health aide or companion) will be coming in to visit with him for a while. Keep the initial time away short, perhaps an hour at a time. He may protest, but you will need to reassure him you will be back to watch his favorite show or play cards with him. He may sulk or protest, but time away is for your own and his well-being.

Begin as you mean to go on, because this may go on a long time.

Don't sit with him too much so that he comes to expect it and you can't get anything else done. If the budget permits, get extra help in place now, so that you don't get burned out, and so that that's just "how things are" now that he lives at your house.

When people offer to help, say YES and give them a specific task: "Can you sit with dad on Thursday evening?" or "Can you pick up these things from the store?"

Are there any adult day groups or other groups of men his age that he could take part in?

It takes a village, so start forming yours now.