When I started growing I ran the Fox Farms trio with some cal-mag on hand and it ran well. Pretty good inexpensive nutes (or at least they used to be inexpensive!). You don't need all the bottles they sell, so stick with the trio if you go that route.
Folks have good results with Remo here (long time sponsor) which is what I'll try when my Rx Blend runs out. There are some other
sponsors that I wouldn't recommend but that's not for open forums.
If you want to go with something different, there are a lot of successful
@GeoFlora Nutrients growers here so that's another option.