Hey PRJ since1990,
All the other player sugestions are fine, but If you start alone It is going to be really tought.
My sugestion is look for a hobby-shop near your location(There must be something near your place)
Just by finding the shop the shop owner should be really helpfull, you just have to take care is not trying to cheat you.
Once there check if there is any kind of workshop or painting course, or even better, just people who like the hobby and are open to make some friends. You can post an anouncement or just ask the people there.
It doesn´t matter how many tutorials we post you here, (anyway if you want more I am pretty sure there are many), If you find someone to teach you it is going to shadow any help from us

.
Just think that the game you have purchaise is really interesting and new and you will fine people willing to play with you and help you with your miniatures.
As well this is universal

your first tries are going to be real aborts, even with help nobody is good on the first try (maybe there are excentions), It is really necesary to train yourself.
My sugestion would be to buy another miniatures to practice, just a bunch of cheap but detailed ones and take a look on your results.
Even better post them here and we will help you to improve.
And try to aboid Gamesworshop shops, they are find but they are not going to help you if the product is not of their brand, the best thing is a general gaming store with tables to paint.