My current sens is 1.669 (nice), my DPI 1200 and my eDPI is 2002. I've heard that having a low sens is better, but if I lower it would I mess me up in other games that need a high sens?

So, I am a Reyna main with Omen as alternative agent in gold. Now I decided, that i want to add Jett to my agentpool. I have played her in a few unrated games and I noticed that i can only use her dash. I have no clue how to use her updraft...

So I just did my first comp placements ever, i got placed silver 1 with winning 2 matches and losing 3. I then won another and got +27, then lost 2 more matches and lost -23 total. I main fade pretty much, shes the only agent i feel comfort...