Moving with h,j,k,l when in insert mode

I'm a big fan of vim and started to use h,j,k,l to navigate on code instead of arrows. Not moving your hand from home zone to arrows is very healthy and I was upset when in insert mode. Insert mode requires arrows to navigate and it feels so wrong to escape and insert again if I want to edit upper line.

After some investigation I added these configs to my vimrc:

imap <C-h> <C-o>h
imap <C-j> <C-o>j
imap <C-k> <C-o>k
imap <C-l> <C-o>l

Now, I can use ctrl + h, ctrl+j, ctrl+k, ctrl+l to navigate in insert mode.