That's nothing to be embarrassed about. It's hard to commit until you're fit. Eventually you get to a point where you look forward to going to the gym if you stay with it long enough.

If you have a good trainer that can help with the commitment issue. If you have a bad trainer it can make it worse. I've had both. I had one trainer that wouldn't listen to me and just always pushed to hard; then during a session I puked from over exertion. I was so angry and embarrassed I didn't go back to the gym for over 3 months.

Anyway the point there is if you are going to get a trainer then vet them before you sign an agreement.

A couple of other options to help with commitment is to join a fitness group or a class like Farrell's (https://extremebodyshaping.com/).

Some of these have support/accountability groups so if you no show someone is going to call and ask where you were and in return you do the same thing