Alright, two ways to go from here:
One is to stay out in the garden and keep going, adding rows, adding seeds and seedlings and so on as the weeks and months amble by — and that works: seeds from the packets, seedlings from the nursery, and off you go.
The other is to order what seeds you’ll need — including peppers, tomatoes, and such, which need to be started inside under lights — and go that way. This means setting up an indoor growlight station (which is quite cheap and easy, actually) and grow from seed as much as possible to have a better choice of variety, and avoid commercial greenhouse diseases, of which there are many. More on that later, below.
But let’s stay out in the garden for now. It’s spring. Plenty of time for growing from seed, mind you, indoors or out. It’s almost too early to plant tomatoes indoors from seed in my house (Rhode Island — where I don’t plant until six weeks from setting out the seedlings), so hope for a sunny day and keep going with garden soil.