You don’t have to feel like it. You just have to start it. The feeling usually catches up by minute ten.

Motivation is usually a result rather than a requirement. The feeling you are waiting for tends to show up once the thing is already in progress, generated by the doing, which is an awkward order if you were hoping to be moved first. Starting is therefore the part that has to happen without any support.

Agree with yourself to do ten minutes and allow yourself to stop after them. Most of the time you will not want to, and on the days you do, ten minutes still happened.