newbie with t-rex on 2miner

I started to mine RVN on 2miner, my GPU's (1650ti laptop) Hashrate is about 8.5 MH/s. And because of the difficulty which is IDK why always 4.29G. I am only able to have about 10 shares/hour (maximum). I make about 9-11 coins every day. So IDK if possible or not but is there a way to lower that difficulty.