Beginner and time matches

Hi,

I need a little advice  

I’m playing a lot atm and have got to the point where time is a real issue, getting to a closing point on many games and time cuts me out / I lose.

I usually play 3 & 5 minute games. 

For generally learning to play chess, is it better to play 10min matches to have enough time to finish, or stick to accepting the fact I’m not being quick enough although in winning positions. 

I’m not sure if it’s ego that wants me to win and not accept the loss (on time)

or

for progressive learning it would be better to play less games that are slightly longer (10mins) and learn more effectively, im sure people must have been in this paradigm before.

Thanks in advance,
Doug