19 year old beginner with about 7k in savings and $150 in Syfe. Should i dump 65% of my 7k in equity 100 and wait out 5-7 years and keep the rest in a high yield savings acc?

I'd recommend you ensure you have sufficient money as emergency funds and invest the rest. Generally speaking DCA vs lump sum investing doesn't quite make a difference if you're in it for the long haul.
Have a watch of this video here. It's really quite a good summary I feel.

https://www.youtube.com/watch?v=fd5y1I_41rE​​​

Hi, would still recommend you doing DCA on a monthly basis. Instead one lump sum or just $50 into each portfolio, you can consider increasing the amount that you are putting inside each portfolio on a monthly basis.