I'm not the best reader around but I do a lot of transcriptions, one thing I find helpful when trying to notate the line you;re working on is to find which notes are falling on definite beats, like beat 1 or beat 3 and go from there. Also trying to figure out the smallest subdivision, eg 8th notes and split the whole bar into eighth notes and tidy it up later. As everyone else has said, it's not easy but it does get easier!