I want to beat Dream's speedrunning time, which will be a reach because I've only been speedrunning since this past month even though I've had minecraft since 2014. If I beat dream's speedrunning time, it will be a miracle haha. Tell me what you think, will I be able to do this?

You may want to aim your question to the game's forum page or Discord server. Third place isn't impossible to reach, it'll just require lots of time and dedication on your part.

I've had Minecraft since 2014 as well and I've never even beaten the ender dragon lol. But I've been practising some strats and I might do a run one day. It's a start I guess