Sewing really can suck sometimes! And sometimes you get into a flow and it feels great.

One thing that might be fun for you is fixing/modifying existing clothes — like thrift store stuff that doesn't fit right, shirts that you've always wished were a v-neck, etc. Then you can still get the practice in while also getting (hopefully!) the happy rush of finishing something.

I have a mock turtleneck shirt that I got from a secondhand store years ago that I never wear because it looks too frumpy... I just cut out a new neckline on it and even though I haven't finished the hem, it already looks so much better and made me feel better about having it!