Acknowledge your fears and then figure out how to deal with them. Express that to his care team. They should teach you everything you need to know. If they don't, ask, and keep asking until you feel able to do what you need to do. Don't let them just hand you instructions and send you on your way. They should ask, but if they don't, tell them how you best learn. Reading, video, hands on-make your needs known.

No one expects you to have this knowledge going in.

You can do this.

Me 57/H 58
M36 S 2.5yrs R 12/13

Let me give up the need to know why things happen as they do.
I will never know and constant wondering is constant suffering.
Caroline Myss