Hi I hope this helps, as I learned playing piano alone. In the real beginning I was simply counting CDEFG...Crazy.
To learn faster reading piano notes you find some reference lines. For right hand, The C is that note at the bottom which is crossed by a line.
I know that first bottom line is E. I know where is the C one octave higher. I know that the last higher line is F and so on , then I fill in the gaps with the notes wich are up and down.
You do the same with the left hand key. The lowest line is G. You know that the key is on F. You know that the note above crossed by te line is C one octave higher and you also try to know where is your C. Then you fill in the gaps with one note higher and lower.
But it's all practice, practice practice.
Best Way to learn to read notes by: Pinka
The best way to learn to read music notes is to write them on the staff and cut the paper to pieces (One note for each piece) and write the name of note on the backside of the paper.
Then randomly choose one piece of paper, look at the note and try recognize the name of the note or how it looks like. You must repeat it daily but then you will learn to read the notes very quickly. It's basically a "MOMO" game. This helped me a lot. Best whishes!