Advice for a newbie

Hello everyone, I'm a newbie when it comes to crypto mining, currently mining Rvn 47Mh/s rx 7900 xt. I would like to ask what is the best way to mine GPUs now. It is better to choose more Mh/s with less efficiency or less Mh/s with greater efficiency (and what should the efficiency be). And when calculating the miner's fee, I still believe that a certain percentage is subtracted from what the console shows. And what is the best miner for AMD and what is the best for mining on them, I used team red miner for a while but they have a 2% fee, and I changed to srb which has a 0.85% fee, the console shows the same speed (47Mh/s)thank you 🙂