I don’t think you’re too late to start this season, you can definitely get a strong colony built up before winter and then go into next season with a strong colony (after over-wintering).
If you do plan to start next season, you will need to get your name on the list with a beekeeper for a Nucleus now (for next season) as there is huge demand for Nucleus hives and the waiting lists for next season have probably already started!
If you do start this season aim to get at least a single brood box with correctly drawn comb (ie. nice, clean worker comb with plenty of laying space for the queen) and as lenr has mentioned, don’t go into it expecting a harvest this season.
All the best!