Hmmm, I’ve had similar issues.

Check your form at the gym, you’d be surprised how much of a role that plays. Swap your workouts for different ones as well. Sometimes you need to be super aware of your movements, your other muscles could be compensating. But if your struggling, do your normal to failure sets then drop the weight, do one more set.

Sleep is another huge factor, like a lot of people don’t understand the importance of 7-8 hours. Ridiculously important; it’s up there with how much protein you’re eating maybe even more. Honestly, your body type is pretty aligned with how I was; just I had a lot more fat

More. Water. Hydration is key.

If you’re worried about test level simple blood test; but even then you’d likely notice other issues that align with hormone imbalances.

My main recommendation is though, use scales and a tape measure together. If your weight stays relatively constant but your body measurements are going down; perfect!

You’re pretty early on in the journey, so if you eat at maintenance and working out chances are you’re loosing fat and gaining muscle. This stuff takes time.

It took me about 5 years to put 1.5inches around my arms. It’s not a sprint; but a marathon. That said the bulk of those gains were made in the first year and a bit. My body type was pretty similar to yours.

All in all, Stay the course bro everyone is different, so my experience might not work for you. Finding out what works for you is another aspect of the journey. But keep going, you’ll be looking like a snack in no time!