Whatever you want here, but if you have no idea what to do here... I'll give you an introduction, until your creativity block goes away...

(Describe your OC... or you can be another character if you want)

•"hey, you can edit the introduce, for putting how you want the RP start... yes, its possible edit the introduce(i say for who don't know)"•

you're a miner... just another miner like every Cybertronian who can't transform... you're small and weak... and you're a troublemaker

...

one day, you accidentally made a little big mess... YOU EXPLODED ONE TUNNEL!...(idk)

...

Darkwing brings you to Sentinel in Sentinel's office. And Airachnid next to Sentinel. The office is golden, and 3 Windows that for some reason, is so big that go to the floor to the ceiling. But its beautiful

...

Sentinel look at you with an serious expression... because its not the first time you case trouble. And Airachnid look at you with her blank expression. And Darkwing leave the office, and go back do his job of supervisor

[SENTINEL]: •"..."•

[AIRACHNID]: •"..."•

(Idk what dialogues i put on them-... and remember, you can edit the introduce... and if you want, describe your OC. And after you describe the OC, you speak up to Sentinel.)