You could try doing push/pull 2 days on 2days off.
Push: Squat, Bench, Military press + other shoulder and tricep work
Pull: Deadlift, Row, Pullups etc.
As many compound lifts as you can manage on each day, which is what you should be concentrating if you are a beginner/novice.
I did that for about 8 weeks at the start of the year and had fairly decent results. After 8 weeks I hit a plateau on strength gains on my squat and deadlift though and went back to a 3 day split.
^^^ This… You shouldn’t really be focusing on any type of isolation movements until you’ve reached your size/weight goal. Heavy compound lifts, olympic lifts, and also incorporate different types of pull ups into your workout i.e, wide pulls, close grip pulls, reverse grip chins, etc… You shouldn’t have to worry about focusing on your biceps/triceps directly if you are doing heavy push/pull excersises twice a week. If you aren’t sore and gaining, then you aren’t lifting heavy enough, eathing enough, or you aren’t doing it properly… Good luck
Though I believe a push/pull type split would work well for an individual, I don’t know why your telling him not to do any isolation movements?
Look, no one ever told him to FOCUS on them, but adding a few movements in at this period is critical. If he doesn’t, he’ll build a body thats not proportionate.
Likewise, adding isolation movements help to develop the mind muscle connection early on, which is IMHO, VERY important.
OP, a basic routine, like a push/pull split, upper/lower, whatever…will all work fine. Add in some isolation movements, as they are important.
Progression, consistency and effort are what you truly have to be worried about