Once you've done that, find two Beatmap Nominators. You can find a list of BNs currently accepting requests on the BN site, as well as instructions on how to contact them and what types of song/map they like.
(Also, this thread doesn't belong in Gameplay and Rankings, it should most likely be in Mapping Discussion)
Also as stated in the post above, make sure to request on the osu!mania Sub-forum.
And additionally you can also use the in-game #modreqs channel to request some mod or #mapping channel to request some testplay, or even ask on #osumania to ask some feedback.