You should train with a personal trainer one to three times a week. Once a week: If you have a limited budget and can train alone at least once a week. Three times a week: If you want to learn exercises faster (and maybe make more long-term gains). The ideal number of personal training sessions to complete each week is three to four 1-hour sessions to see the fastest results.
If your budget doesn't allow it, two 1-hour sessions a week are sufficient, as long as you complete several more sessions on your own. Gaining strength and mass also depends on your diet. The coach can suggest specific foods or supplements that have the potential to accelerate your gains. If you spend some money on yourself this year.
Leave it to a personal trainer. Three to five workouts a week are recommended for best results.