Jobs abroad - How to apply?

Hi everyone! I want to move abroad in the next year/ 2 years. I currently have 3.5 years of experience in Management Consulting in the Energy Sector. I want to move to UAE/UK/Netherlands. I have a couple of stupid/ fundamental questions-

1. How to go about looking for and applying for jobs?
2. Do companies provide assistance with visa etc or we should get that done on our own
3. What is the minimum salary baseline I should consider for accepting an offer in these countries?

If someone has an experience of pivoting from India to any of these countries please help a fellow junior understand the basics of applying to jobs abroad.