1. no one can tell you what levels your protocol will give you. It depends on your response. Saying that, its a fairly aggressive protocol that will leave most guys high. Consider even the most healthy top end young male produce just 70mg a week. Take off the ester on injected test and thats a top end dose of 100mg per week without hcg.
2. the first month of trt has no relevance to how you are actually going to feel long term. when that pure testosterone hits your blood for the first time you are going to feel like a million bucks but that is not reality. its not something you can really trial for 1 month and make a decision.
3. You should not be having these symptoms with a Total testosterone of 345 ng/dl.
(low libido, anxiety, brain fog, moderate-severe depression). Please look elsewhere for other factors causing your problems. If you want to live in a heightened state on TRT thats fine, but i promise you these symptoms are not because of having a testosterone of 345 ng/dl. TRT may cover it up as a band-aid for sometime providing you with a heightened state of being but its not sustainable.
4. 500iu hcg twice weekly may preserve your fertility for some time. But no one knows if thats enough long term. If you go through with this , a couple years in may reveal low sperm parameters. you would need to at that point run 1500-2500 EOD based on the medical literature to get fertility back.
5. I do not recommend trt in your situation. For people who do not have low testosterone such as yourself, there is only one health perimeter that could benefit based on the medical literature. Metabolic health. But this can be fixed easily with diet alone so there would be no reason to use it for that reason. In short, there are no health benefits for someone not deficient in testosterone to go on trt.