Can anyone help me with block building i am having a really hard time with my first layer
I tend not to 'build' blocks while solving. There is normally a block of some sort on the puzzle before you start, so firstly, try to make a layer without two edges. Afterwards, just insert the pieces like normal.
If there are no blocks, try to look for 1 move blocks which help the solve, rather than make it awkward or inefficient. Also, try to see your whole layer during inspection (don't use timed inspection at first).
The rest comes down to practice, from doing this, you will learn a handful of tricks. I also found doing your layer 'FMC style', in other words, trying to use as few moves as possible to make a layer. I found that solving 2/3 of a layer, AKA a 'V', took 4-5 moves on average (I use l4e) from just learning a load of tricks from practice and experience.
TL;DR: preserve blocks, be efficient, use inspection wisely, work out tricks to help increase efficiency and practice.
Sorry for the long post, hope this helps.