FLR - Final check before sending!

I'm applying for FLR(S) and of course now going into panic mode in case I;ve forgotten sth or not addressed something properly! I have the following issues:

One is the form asks for proof (or a document) of acceptance of the uni's offer of a place - I did this online and have to real proof of that. I have the uni's letter offering the place (unconditional offer). Can I attach a letter just saying I accepted online and sign it?

Another is proof of satisfactory progress showing exam results etc. I have not had any exams yet, they are due after current visa expires, so again, should we just enclose a document showing this?

Finally, in a few months i will be required to spend a year working and studying in Germany (I study language) which is completely organised by the uni, all visa and job issues will be sorted by them with respect to that. I still wish to return to UK to see my bf as much as possible, but I wonder if I should mention this in a covering letter, since I will be out of UK for the vast majority of the time and not dependent on any sponsorship or need to work in UK.

So, can I add all this with the application, or will the IND just basically read the answers on the form only?

I add that I am Russian and English is not my first language! This is my bf's account here!

Also obviously course id full tie degree for three years duration and approved on dfes list.

Thanks

Nadia