My best tip is to read on ebook: that way by putting dictionaries on it you can see the meaning of the word instantly by touching it. If you're reading a physical book the best dictionary app for your phone is I think Wordreference.
As soon as you can I think it's important to start looking up every word you don't know, that way you can quickly expand your vocabulary. Often the same word is repeated so it's better to look it up the first time. If you don't know enough English for that yet start by looking up every word that's needed to understand the meaning of what you are reading. Or if you don't know enough English even to do that, I suggest reading a book you don't care about so that it doesn't always matter if you don't understand, a funny book or a so bad it's good book, that's what I did, the first book I read in English when I was a young teen was actually fifty shades of grey and I didn't understand but I found it really funny and I learned a lot of words without understanding everything. Next I read hunger games looking up every word and it was a very easy read and next I read Harry Potter which was harder and really expanded my vocabulary by looking up every word.
Btw "advice" is uncountable so even when it's plural it doesn't have the s