Tips for a novice cyclist wanting to get fit with a turbo trainer before summer
A lot of cyclists find they need motivation to train on a static trainer. It can be unrelentingly tedious to sit spinning on you bike staring at the same wall when you are used to nice scenery going by. If you are used to running on a treadmill or a similar exercise this may not be such a problem for you.

As you have a smart trainer that will work with Zwift, I'd recommend getting a subscription and taking advantage of the structured workouts they offer, and the motivation of virtual cycling courses and competition. You only really need a laptop or tablet to create a workable set up.

If you are not going to do Zwift, there are structured training videos for 30-60 min workouts on you tube that you can use. The Global Cycling Network has some pretty good ones.

You'll want to figure out what your goal is for when you transition to outdoor riding and pick appropriate workouts. E.g. if you live in a hilly area you would want to train for hill climbing, or if you want to do long rides select workouts that build endurance.