I can only answer 1, 2, and 5, so here we go
1. As someone who has been in the community for about a year and a half, at this point I don't even remember what it feels like to be cis and straight. At this point, it just feels normal, but at first I think it felt kind of overwhelming, especially when I discovered all the different genders and sexualities and romantic orientations that helped me open myself up to more possibilities. Sometimes I realize just how amazing it is that in different than a lot of other people, and how I'm probably also one of if not the best genderfluid musicians in my district. At first, for some people, I can be hard for them to accept that they aren't straight, and I've even seen people go through the five stages of grief because of it, since they were so caught up in the idea of being cishet. But after a while, it does just feel normal.
2. Being LGBTQ, you will often get bullied. A lot. I've even experienced bullying from a guy who I'm pretty sure he was gay but just in denial. It can be a lot harder to find the right person for you, as 8 times out of 10 (in my experience), your crush won't be gay or whatever they'd be if they were to date you. It can also be frustrating if you're under what I at least consider the trans umbrella (anything that isn't cis pretty much), it's not uncommon for your gender not to be mentioned in surveys, and sometimes the only options are male and female, which can be incredibly frustrating, especially for people who have genders which either simply aren't or tend to change.
5. I'm not bi, but this really applies to pretty much every sexuality or romantic orientation that is attraction to more than one gender. To get it down to the bone, it really depends on what your levels of attraction between the genders, for example liking one gender more than others, but still liking all of them. But to be honest, for the most part, it's just as hard to find a partner. Just because you have more options doesn't mean that you can date anyone you want, since they aren't all the best people or you might just not feel any attraction to them at all. But probably the hardest to find partners with is demiromantic or demisexual. These two only feel attraction of any kind towards people after forming deep personal bonds, which means oftentimes people will only like their best friends. Sometimes people won't like any of their friends in that way, even as demiromantic or demisexual. Continued in next comment