Try a beginner Brazilian Jiu-Jitsu class for 10 euro.
Going to the gym is not for everyone. Instead of just working out, you learn a real skill while your fitness, confidence and discipline follow. No previous experience required.
Takes about 60 seconds · €10 trial class · No experience required

If you have tried getting fit before but struggled to stay motivated, this is probably what was missing. A class at a set time, with people expecting you, and a skill to show for it.
Jiu-Jitsu works because it is pressure tested every session against someone actually resisting.
Nobody counts reps. You train, you sweat, and the conditioning turns up on its own.
Turning up when you do not feel like it is the whole skill. It carries into everything else.
Experienced instructors, and a room full of people who were beginners themselves.

A new course opens every month, so you learn the basics alongside other complete beginners rather than being dropped into an advanced class.

Nobody is, at the start. You go at your own pace and the fitness follows the training.
Everyone on that mat was. Beginners courses run monthly so you start alongside other beginners.
No striking. You train with a partner, not against one, and you stop whenever you want.
Shorts and a t-shirt for the first session. We lend you a gi.

Ten euro and one hour, and you commit to nothing after it. Everyone in that room was a beginner once, and most of them remember exactly how it felt to walk in.
Takes about 60 seconds · €10 trial class · No experience required