MAKE it convenient. Have your stuff ready by the door or garage or wherever you keep your bike.

Read the weather report at night and in the morning, and know what clothes are appropriate for the various possibilities today. Bring at least an extra pair of socks, because you don't want wet feet all day.

The more you do it, the better you'll learn what clothes work.

Most of all, it takes a commitment to do it. If you just try it as you've been doing, it will seem like a losing proposition. If you say you want to do it, you'll do it. MAYBE you'll learn it's not for you, but that doesn't seem likely unless you have a long way to go or you have a lot of things or people to carry. And you'd be surprised what you can carry if you really want to. I towed both of my kids in a trailer until the trailer held 180 pounds (82 kg), above the recommended max. This takes commitment, though, because the equipment is expensive.

I now use a kiddie trailer for groceries, etc. I still have a car, and I'm working myself towards a "car-light" existence, not car-free.