A word of encouragement
I can say is that photography is still at a hobby level for me
Tweek, you have the talent and all you need is someone
to push you a little harder with some guidance. The rest
will fall into play with some thinking and planning.
A creative photographer is also a grateful and humble person
and these qualities are hard to find. Thank God for that gift.
Give yourself two to three years to mature and keep shooting.
Do it at your own space and don't spend unnecessary buying
equipment that you don't need.
As for now you need to have the 2x teleconverter to take
advantage of the achievable 160-400mm. Serious hobby
image-makers will never make it to the exhibition hall
without welfare and sincere encouragement.
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You have good taste, and so do the rest of us
Broaden your perspective and concentrate more
on the important issue of aesthetics.