They are growing fine and you're ready to move to the next step, moving them outdoors. Keep in mind it will all be worth it. The selection of plants available from most nurseries, discount stores and grocery stores is meager at best. By starting your own seeds indoors you open yourself up to an endless selection of Tomatoes and Peppers. Anyway the most crucial step is the next one.
Gardening is mostly common sense.
Keep in mind your plants have been in a controlled indoor climate. Probably between 65 and 70 degrees with no wind and partial sunshine through a sunny windowsill in most cases. These are not the conditions outdoors where these tender plants will have 30 degree swings in temperature, direct sunlight and some windy conditions. Some gardeners start out even simpler than this by opening the window where plants are growing a few inches for an hour, then two, then three hours per day. Then leave them out overnight for a full day.