I agree with Blade, you really don't need to rush it.
https://bodyrecomposition.com/muscle-gain/muscle-gain-math.html/
Along that line, Lyle posted an article a while back talking about how much muscle you can realistically expect to gain per month: basically comes down to maybe a pound of muscle a month at most. And to minimize fat gain so that you are only gaining enough to put on that amount per month means a relatively minuscule calorie surplus. This can really be as little as just adding a protein shake to your day on top of your normal diet, assuming you are eating at maintenance normally.
https://bodyrecomposition.com/muscle-gain/muscle-gain-math.html/
Along that line, Lyle posted an article a while back talking about how much muscle you can realistically expect to gain per month: basically comes down to maybe a pound of muscle a month at most. And to minimize fat gain so that you are only gaining enough to put on that amount per month means a relatively minuscule calorie surplus. This can really be as little as just adding a protein shake to your day on top of your normal diet, assuming you are eating at maintenance normally.