While its dm dependent, my dm has ruled I can prepare up to level known as my multiclass character, bard/paladin, any chance we get a button to allow the access of spells up to level know for both?

You can prepare additional spells by going to manage spells, opening the spell you want to prepare and clicking the prepare at the bottom of the description.

Be warned this is a pretty unbalanced house rule.

as a level 1 bard I cant touch level 3 bard spells though

In order to grant access to spells from a higher level or another class, I recommend making a homebrewed feat.