Hello guys looking for advice.

40 year old who's been exercising for a few years. Started TRT three years ago. Got more serious lifting this year in January when I started to go to a gym five days a week. But since that came to a end I bought a complete gym setup in my garage now and I'm continuing to go five days a week. My TRT dose is 232mg of Test C a week and I take .25mg pill of arimadex two times a week (Mon/Thur). I can go with only one dose of the AI pill but get more agitated easily so I usually take the two. Either way I have killer night boners and a great sex drive and that's what I base the dose on. I do get labs threw out the year though. When I take three the sex drive and night boners aren't as great. So I feel 2x's a week is my sweet spot. I also take three shot's of HCG (450iu's each shot) a week for the balls. My body fat % when I started at the gym in Jan was 15.3 . I used their machine. Since then I've lost more fat and my abs are more visible but have no way of knowing the exact number now with them closed.

So for my first cycle I'm thinking (and after reading different post here) I should keep it simple and raise the Test dose by 300mg a week so I would be in the 500 to 600 range (532 to be more exact). My prescription is for three doses of the .25mg AI so I have extra in case I need it and figured I'd buy one kit of the arimadex 1mg/50 tabs to make sure I'll have enough in case I have to take more then I thought.

Or those arimadex tabs breakable to take a smaller dose?
Does adding the 300mg of Test C sound good?
How long should I run it before I go back to TRT levels per week?

I also learned about Anavar here and I sounded like something I'd like to try. But should I wait till I do my second cycle down the road?

I'm looking to put on some muscle and stay lean or leaner if possibly. I'v done both already since being on my TRT dose I just want more of those results lol. I'm not looking to get to a size I can only maintain by doing many different things threw out the year. Or at least not now lol. I enjoy having no sides and sleeping like a baby every night.

Thanks for any help and guidance.