The things that revolutionised knitting for me are row counters and stitch markers. I have two types of markers, ones that loop on like theseamzn.eu/d/djMRUR9
And ones that you can open and close like these amzn.eu/d/hQd8ZEI
When knitting any kind of repeating pattern, mark the beginning and end of each section of the repeat. So if your pattern says:
K6, (K3,P3,K3) repeat to last six stitches, K6
I'd put a marker after the 6th stitch, then every 9 stitches, to the last 6 stitches. That way I see every time I need to start the repeat. And I can count back if I get out of the pattern somehow,
I also use them when casting on for large projects like blankets, I put one every 20 stitches I've cast on, so I don't have to keep counting from the beginning if I lose count.
Row counters. amzn.eu/d/iuGs0fw these ones sit on the end of your needle, so you won't lose them. Others sit on your thumb, or on your wrist or on a necklace. Or if you need to do for example 20 rows, I often just mark 20 lines on a bit of paper and cross them off as I go.
The more you knit the more you will learn. Keep doing it and you'll turn around one day and discover you have a dozen different sets of needles and you're stashing yarn all over the house.