1: og art, i seriously love ur art style omgogmomg ur linework is rlly pretty and soft and round n stuff i cant explain it but absolutely no notes on it, i think what ur looking for most is just placement and rendering (i have a rendering tutorial which isnt the best but exists, if you have any questions pls pls PLS let me know https://scratch.mit.edu/projects/1350927920/ ) but rn im going to try to help with anatomy (you also said you need help with poses which we can get to on another project if ya want) and i also think helping you with contrast wouldn't hurt too BUT ANYWAY lettuce get started :0 2: when you draw a circle over the head you should see everything in and around it as 3d/curving around the sides/edges of it and (im assuming) the original is symmetrical so to start off im moving the cheek fluffs a bit lower 3: you can also see that the eyes are flat and just placed onto the face without much thought. u should place in the eyes while keeping in mind that they're eyeBALLS and spherical. i myself am also trying to get better at drawing eyes but you can kind of think of them as 3d semicircle stickers if that makes sense? i also drew a side plane of the head bc i assume they're looking a bit down and to the left and not head on 4: i just squished the eyes and followed the pattern of the reference+gave them a bit more contrast so you can see the pupils and lined up the cheek fluffs to match the other side's! and i made the mouth's uhh what do u call it MUZZLE i think idk a bit more defined 5: you can see more of my logic alignment wise +i moved the other sides cheek fluffs to face the viewer a bit more since they felt like they were barely hanging on in the original, but if that was what you were going for then by all means keep it like that short intermission with a basic "guide" on how i usually structure cat heads, not 100% accurate duh but good basics. and a random doodle um 6: placement of ears (stylized example but shows basic construction) 7: ears moved over to fit into the guide and i added some contrast in some places to help their forms pop out more since again i really like your linework and i feel it should be more seen, plus it makes the whole thing more clear, but since it isnt the main part of this critique im not going to rant on about its importance rn (unless you'd like me to...eyes emoji...) andddd yeah! i rlly hope this helped in some/any way at all :] feel free to ask questions and dont be shy im here to help