I think everything AmericanJambo said is good / I agree with ..only major ``caution`` is relating to cutting the lace with a scissors...... don`t do it !
If anyone wants/ needs to trim or cut some lace off a system, they should use a small sharp blade, such as a hobby / craft knife ..turn the system upside-down, and draw the blade across the lace ...do NOT press it down through the lace or you`ll slice through hairs which you want /need to keep ..... just apply a little light pressure as you draw the blade across the lace towards you and the lace will separate neatly, leaving the hair on the base intact...
A non-graduated hairline can really cause issues...younger guys can often get away with wearing them [ I know you`re young] ....it`s possible in your case that graduated would have been better to order...you can carefully thin it a bit by applying small dabs of hair-removal cream [ Nair] carefully to the knots.....you need to proceed very carefully and slowly with this if you decide to do it...... you just dab on tiny ` dots` of it , here and there, [the tip of a cotton-bud from which you`ve removed the cotton is ideal for it] allow it a few minutes to work and then rinse it out .... you may not see much shedding out immediately---- more will shed out in the next few days so if you decide to do this, do it very slowly i.e. over a week or so.... all systems have this ` bounce` in them and are very very ` lively` ...once you`ve slept with it on your head and washed it a few times it`ll begin to settle down .... from what I can see it isn`t as ` bad` as you imagine ..you`re naturally going to be SO self-conscious of it now --it`s your first ever system and first time wearing ---it`s a big psychological step to take.... it takes a lot of ` adjusting` , and as one of the guys said above, it rarely goes without a hitch !
You should go back to her and make your concerns known , as has been suggested.....kind regards !