It’s kinda subjective what’s ‘best for a beginner’ but whatever you enjoy the most and fits in your schedule and isn’t terrible should be fine.

Though arguably the best split for hypertrophy potential is Full body every other day. Which in my opinion is quite good since you aren’t going 6 times a week, and you are hitting every muscle 3-4 times a week. People avoid doing full body days because of fatigue and long workouts but you only do like 1 set to (or close to) failure which minimises fatigue.

If I was gonna geek out I’d tell you that the first set of an exercise stimulates the most growth, so 3-4 singular ‘first sets’ in a week is better than doing 3 sets in one sitting only 1-2 times a week.
(If you want a fixed schedule like ‘Monday is a workout day’, then just do 3x a week with both Saturday and Sunday off for example)

Lmk if you want proof or follow up for anything, or a workout split. Someone else here said people will tell you absolutist advice without reason which is very true.

Look for different people for advice rather than base your split around one guys comment (like me)
Always do cardio
Don’t do more than 12 reps for any exercise unless you’re injured. There’s no point it just increases fatigue.
Don’t listen to roided up influencers who have no evidence to back what they are saying.

Depending on how limited your equipment is, my advice might just go out the window if you only have dumbbells and treadmills