For your level, not bad. I would say that your first move should be level 30 Legendaries. Those are the closest to level 10 VIPs.
I’m laying this out for you :
Level 10 VIP = Level 30 Legendary = Level 20 Tournament Creature
Level 20 VIP = Level 40 Legendary = Level 30 Tournament Creature
They’re not exactly equal but very similar. Since you’re not VIP, these would be helpful. But for now don’t focus much on Lineup since you’re still at level 23, I would say focus on aspects like coin and food production since you’ll be ready to unlock Legendaries from level 50 or 48 (not very sure).
Also, try to save up resources like DBs and LPs as of now.
I don’t have much experience with deepening this Lineup bench (I had a similar one to yours as said before), because I moved from this Lineup one week and to three level 15 VIPs the next… I move in jumps so I might not be very helpful but this is what I feel.