You will need much more Boyz, a Warboss or two (maybe convert one to ride a bike) and a Big Mek or two with KFF
(also make them ride a bike).
Here's a link to Army List section where you usually post your lists: https://www.dakkadakka.com/dakkaforum/forums/show/14.page
You should also check out thred about Ork Tactics in 8th edition: https://www.dakkadakka.com/dakkaforum/posts/list/727761.page
(unit analysis on the first page can help, but is kinda outdated; if you don't feel like reading all 120 pages you could start with the last 30)
Edit: Also, welcome! (sorry for being inpolite ^^')