It was not long time ago when i did my first 4x5 shots as well, i had 2 issues, one with a black frame or border appeared about 15% on one shot on the top, and the second was that i double exposed 1 sheet and i thought i exposed 2 sheets that were loaded with 1 holder [both sides], so i learnt very well, but what i am happy with is that with all those mistakes i've got shots at the end except one sheet that didn't expose, then i did shoot one more sheet and developed by myself to be the first ever sheet to be my home developed one and got a shot with some scratches, all these making me happy to have a good start rather than nothing at all, now i got the BTZS and i am waiting something for my LF camera to start shoot more seriously soon i hope.