Its now you need to consider the cot mattress height. It wont be long before a sitting up baby can lean over the side of the cot if the mattress is in the highest setting and so fall out.
At this age I has the cot next to my bed, third side of the cot back on (rather than bedside cot) but the drop-side down. This meant I could lean over the low barrier to settle baby to sleep in the cot, as needed.
Their are two circles of thought at this stage. One is to allow baby to learn to lie him/her self down and settle to sleep alone. The other is to teach baby that sleep time is a time to be still, quiet and relax - not a time for sitting up (or in time standing up).
If you have already lowered the cot mattress (so baby is safe) and if baby will go to sleep on his/her own after being put into the cot awake, then definitely go for the first option. The aim is to say nan night, give baby a kiss, place in cot and leave without any fuss. Baby can then settle to sleep how he/she wants independently.
I was still staying close-by my youngest at this age though. I would lie on my bed as baby was in the cot next to me going to sleep. So I encouraged baby to be still at sleep time. It meant a nan night, a kiss, into the cot and me placing a firm hand on baby's chest to encourage her to be still and quiet at sleep time.