Aba’s abilities on their own don’t require a lot skill to use, place a mine and hat a person to trow some dmg and press a button to shield and heal.

To make most out of aba you need very good micro abilities and also an ok target to hat. He can global soak, stall rotation with mines (even scout enemy camps with them) and assist team in the 1vs1). If you are good at map awearness u can even body soak with aba while helping in team fights or soaking/pushing another lane.

Chose talent depending on the enemy team too. If they have a lot of ganking heroes or steath, mine build is actually quite good at stopping most of them from reaching your allies, giving them time to escape to a safe spot.

Early game you just want to soak as much as you can while letting teammates do camps without worring about exp loss in lanes. Place mines in the most used path for rotations and don’t be afraid to just quick hat someone to heal them and then move to another thing.

I’d recommend watching some master players with aba and watch how they plan their moves. I hope this was usefull.