To "speedrun" toh, you first must warm-up. Warming up is useful because it sets the mood and gets you ready for speedrunning. Secondly, you can play on a vip server or public server(A vip server is reccomended) Try to find the right tower e.g. A tower with easy jumps, and many skips. Third, have a good mindset. Thinking that "I suck!" Or "I cant do this!" Leaves negativity in your mind, which makes your performance not as good as it could be, so before speedrunning tell yourself positive things to stay motivated. Fourth, if you still think that you "cant do it" then watch some videos on skips etc. Finally, Dont. Give. Up