yes, checking use less cpu only allows you to see the ground and buildings.
force input allows you to click and "somewhat" interact with your bot while its running a script. usually you'll want to pause the bot before you do this.
i wouldn't bot water jugs. go finish "prince ali rescue", "swept away" and train your thieving level to 65 (just bot pick pocketing for a couple of days.) and then do sorceress garden. it gives about 130k an hour and experience in both farming and thieving. it has a relativity high ban rate, but if your just using a throw away account that shouldn't matter much. (tbh i haven't even got a warning. so don't worry to much about bans.)