From what I have used it on Looking for raid, this is what I do:
1) Log to wow and wait until character is standing
2) Open bot and wait for it to properly load
3) Select Dungeonbuddy
4) Click on Bot Config
5) Go to one of the tab given what you want to do in my case, RAID and it will load available RAIDs
6) You can either click at the top and select all or just select a specific one
7) Press START to start the bot and bang
It will auto queue and do its thing.