You cant mine Ark but you can be a delegate on the network and get rewards (delegate rewards).

This link will help you a lot in set up a delegate :
1. Set up a delegate node : https://blog.ark.io/how-to-setup-a-node-for-ark-and-a-basic-cheat-sheet-4f82910719da
2. Register as an a delegate:  https://blog.ark.io/how-do-i-register-as-an-ark-delegate-133ed2bf218

Also you can earn Ark rewards by voting some delegates in the Ark network.

This link help you a lot in voting/unvoting delegates : https://blog.ark.io/how-to-vote-or-un-vote-an-ark-delegate-and-how-does-it-all-work-819c5439da68