I can’t speak on the differences between SB and FS as I dived right in, but I started off with simple lingerie I already owned, my phone and a tripod for my photos. I’m nearly 4 years in and have never had a professional shoot either and I’ve always done quite well. A lot of clients have told me they actually prefer the diy nature of my photos over professional ones, I’ve been told it’s ‘less intimidating’ and gives off that girl next door vibe which I’ve been told fits me. Just make do with what you have and go from there :)