It can be tricky when you first try neck or armhole shaping because it alters the pattern. Take your time with it and you’ll get there.
When a pattern instruction says patt to end or patt a certain number of stitches, or ‘keep in pattern as set’ you are expected to maintain the pattern that has previously been set up, this can be hard because up to this point you probably could follow all the written instructions, now you suddenly have fewer stitches but the written pattern doesn’t take that into account. You are expected to do this yourself. (It seems unhelpful that at the point where the knitting becomes more difficult the instructions are reduced rather than increased! But it is due to patterns being written for various sizes and would take up many many pages if they were written out in full).
Some fabrics are easier to “read” than others but in any case it takes some practise and is part of the knitting skill which you will learn the more you do. Reading the fabric means looking at it and working out where each type of stitch went and what should sit above it. Should it be knit or purl or a cable cross. Have a look at your fabric, both sides if needed, and see if you can work out what comes next in your rows.
You can also count stitches, or subtract stitches from the written pattern. You made a k2tog on the first shaping row, just before you turned, that means you decreased by 1 stitch. The next row then, you can ignore the first stitch when you read the pattern and begin with stitch 2. This will work for this row. On subsequent rows you need to keep taking into account the decreased stitches.
You can also use stitch markers on your needle. If you can identify an obvious place where you know which part of the instruction goes with which part of your fabric you can put a marker in - for example just before and after a cable cross is an easily identifiable place. Identify which part of the written instruction this is and highlight it. You can then look a your knitting and say I have X number of stitches before that marker so I need to work back from the cable cross the same number of stitches and follow the pattern fom there.
If the cables disappear into the v neck shaping you will need to ignore a cable cross when there are not enough stitches to complete it and replace with another stitch (knit or purl whichever works best with your pattern).
If you don’t have stitch markers you can use loops of yarn as markers.
If you tell us the name of the pattern, or post a link to where it can be purchased, it would be helpful as we can see how it looks on the pattern photo which often helps to identify upcoming tricky parts, like disappearing cables.
There is also a chance that there is an easier way to work the wrong side which is to knit the knits and purl the purls but I’d need to see a pic of the finished item before I could really say this is the way forward. You could also check this with the pattern.