I would need a Accountant for NON-UK Residents to consult me about TAX Paying for LTD Company

Hey!

I have several questions regarding the TAX paying procedures for the United Kingom Limited (LTD) Company as a NON-UK Resident (i am from/living in Serbia).
And my Business is an Online Gaming Store for only Digital Goods (we don't sell anything physical neither we ship anything Physical).
Money and funds that i am earning are through an Online Payment Method Stripe and through online Bankings

I have couple of questions regarding the TAX Paying to the UK / SERBIA countries.


1. How do i pay taxes on my profit in general? How it is getting calculated?
2. Do i pay taxes ONLY on my own profit or i pay tax on whole company profit?
Example:
If my company earns 3000 EUR for example - from those 3000 EUR that i have gotten through my online bank i've paid around 2000 EUR to workers and investments.
So my own profit is let's say 1000 EUR even tho it showed 3000 EUR that i have gotten through my Online banking Wallet. Those 2000 EUR i have transferred through other payment methods to my workers or investments.
Question - does the TAX gets calculated as 3000 EUR (company) profit or as 1000 EUR profit (my sole profit)?

3. Is there any DOUBLE Taxation between countries SERBIA and UNITED KINGDOM .
Do i have to pay taxes only to UNITED KINGDOM if i am doing business with my UK Company ?
Or do i have to pay taxes in Serbia aswell? How does this works between 2 countries?

4. What is the procedure of paying taxes , where and how do i calculate and pay them? I need clear explannation on this one.


Regards.
Igor