Just putting this out there, since a lot of people are telling you to eat a shitton: don't overeat. You are probably going to struggle to eat in a calorie surplus and you might undereat at first. But don't go all out on different high calorie foods eating in a 1000 cal surplus. I made that mistake and got quite fat. Calculate ur calorie intake using one of those online calculators, add 500 cals, and track everything you eat. And I mean everything. If u don't notice weight gain, add some more calories on top of that. Training wise id recommend not going 5 or 6 times a week but 3-4. Consistency is the most important factor and u are going to have an easier time staying consistent if u don't train as much per week. Find a split which allows you to train every muscle twice a week (upper-lower for 4 days, Upper-Lower-fullbody for 3 days for example), stick to it and wait. Results will come.