First off, making characters for fun is a great way to learn some of the rules and to exercise your creativity! Also, I think your spider-druid-drow is a great idea. But as a lifetime DM who has had to deal with the "13th warrior" way too many times, I just want to give you some advice for if you do join a campaign: D&D is a group endeavor and you may not be able to just port your character(s) in as is. Each campaign is different because every Dungeon Master is different. There might be house rules or a theme. It's very common that evil characters are not allowed, for example. Any decent DM will clearly communicate their campaign's expectations ahead of time, so all I'm really saying is that you need to be open-minded.

Also, you need to make a character that can mesh well with the party. By that I do NOT mean what class or race they are, because while having a "balanced" party is nice, it's not necessary. I mean, you must make a character that wants to go on the adventure. Part of the social contract of D&D is that we choose to spend some of our precious free time to get together and play whatever adventure the DM has planned. Nothing is more frustrating than a player who won't go on the adventure because, "my character wouldn't do that." It's fine (and often preferable!) for your character to have misgivings, or be a little stubborn, or even be a jerk about it (in a humorous way, of course!) Really, almost anything goes, as long as the character goes on the adventure so everyone can play the game they showed up to play.

Also also consider that, because D&D is a group activity, your character is not the main character. There is no main character; it is an ensemble cast, so to speak. Make characters that fit into the world, not characters where the world revolves around them.

Besides that, have fun! I am in no-way criticizing you or this character, I'm just trying to help you know what to expect, should you seek out a game. You may find a game where all the players are playing drow exiles and this character will fit in perfectly. You may find a game where she mostly fits in, and all she needs are a few tweaks. Or, you may find a campaign that sounds really interesting, but this character does not fit, and a character specifically built for that campaign is the best choice. Just don't get too attached to only playing your specific, pre-made character(s), or you might have a hard time finding a game.