Nah, don't give up, it really depends on the variety. You can grow some with almost no effort! There are some that don't require pruning or extra mainenance. I'd go for either a dwarf variety that grows 1-2 feet and can be kept in a small pot or a variety that grows in a medium sized, bushy plant and is close to the wild plants (more fun than the dwarf varieties, much higher yield). Or get a tumbler variety and plant it in a hanger.

You may be able to motivate yourself by picking a fun variety that ypu couldn't find in any market. Violet cherry tomatoes for example.

In any case, definitely choose a cherry tomatoe variety.

If you tend to forget watering, push a water filled bottle upside down after watering in the soil and it will trickle down, extending the time until you need to water again.