You're coming along nicely!
1) Exhaling through your nose will help you overcome the discomfort over having your mask off. While there is nothing wrong with pinching your nose while doing a mask removal & replacement, eventually you will be doing skills that require you to swim a certain distance with your mask off. So you might want to practice no-mask breathing to de-sensitize yourself. Just relax. Long, slow inhalation through your mouth... long slow exhale through your nose. Eventually you won't even have to do that, but will just keep a bit of "positive pressure" in your nose to keep the water out. Soon you'll be inhaling/exhaling through your reg like you were born with it in your mouth.
2) Tangled hair is a pain. You can change your mask strap to a wide neoprene one, or tie your hair back. Either one would help. The other thing is to make sure that when you take your mask off, that you prep it for putting it back on by holding it in two hands: one hand straightens out the strap & puts it back properly on the back of your head while the other puts the mask itself back on your face.
3) I'm assuming that the "walking into the water thing" was the giant stride entry. The easiest way to do this skill is to look OUT at something in the distance, then simply step off. (Of course it goes without saying that you should have some air in your BC, and one hand on your mask & reg and the other securing your gauges against your weightbelt when you step off.)
4) Local diving may seem daunting, but in the end you will be a better diver for it. Don't totally dismiss it.
5) "I may ask my husband to join me during my last class session so he can see me doing scuba
if hes got any concerns about my skills, he can observe them, plus he could then talk to my instructor about any concerns he may have." Y'know what? This is none of your husband's business! This is tantamount to saying that you are incapable of learning scuba on your own & making your own decisions as an adult. It is up to YOU and YOUR INSTRUCTOR as to how you progress in this course, not your husband and your Instructor. If you are looking for approval from your husband by taking this this course, then you are taking it for the wrong reasons.
6) Good bouyancy comes with practice. Remember that two things are important with this skill: how much air you have in your lungs and how much air is in your bc. When adding air to your bc, do it in small bursts and WAIT for the reaction... it won't happen immediately. When you do skills like fin pivot and hovering, you'll see how inhaling & exhaling also affects your position in the water column. And don't forget that you can hover in any position you like...even upside down.
Take care, eh?!
~SubMariner~