VERY nooby question, How do I enter a dungeon with my party? lol

hmmm just enter with everyone else ? ( double click and you should enter )
either that or I didn't understand your question

lool i mean how do i even know where the dungeons are? my bad didn't say the question properly

When you press the "M" button revealing the world map, you will see that there will be a symbol on most maps with the letter "U" on it. This indicates that this is a UD dungeon which can only be entered if your in a party.

Apart from that, there are the standard dungeons where you can click on them on the map such as the RP dungeon (upper left castle on korin map).

Any level 40 or 41 dungeons I can enter? Been trying to dragon ball hunt in dungeons as they spawn as dragon ball mobs a bit more, and have better droprates... Or is RP2 the only dungeon that I can farm for DBs in at that level range?

Yeah, RP 2 is the only dungeon up until you hit 45 when you can enter UD 3 (pilaf dungeon).