you certainly don't need to reinvent the wheel for this particular project. However I strongly advise you to code some algorithms from scratch while you are still undergrad. It will make you more confident in the future when you need to write something from scratch. Also I feel like I don't fully understand an algorithm unless I code it from scratch.

as a sidenote, I coded my own version of DTW for my grad thesis because I had to tweak it a little. It gave me a better idea for assessing its capabilities