Plan the session, then enjoy it
Couples practice works best with a short plan agreed before you start. Decide what you want to try, how long the session lasts and which signals mean pause and stop. The partner who is learning leads the pace. Afterwards, each of you names one thing that felt good and one thing to change. Keep it short and kind. The plan is there to make you both comfortable.
Start with Communication, Consent and Signals for Couples and visit the Couples forum board.