Here's the bit most "you need a full gym" advice skips: a pair of adjustable dumbbells covers the overwhelming majority of what builds muscle. I trained dumbbell-only for 18 months when the gyms were shut and it was one of the best shapes I've been in (goblet squats, rows, presses, RDLs, lunges — more than enough). Barbells add a ceiling for heavy strength work eventually, but that's a problem for later, not for now.
What dumbbells demand is a bit more reps and a bit more creativity, and that's exactly what this builder handles — tell it you've got dumbbells only and it structures a full routine around them, then tracks your progress so you keep adding load. Just try it and see what a dumbbell-only week looks like.