There's a good chance that your child won't want to stay in a bed once they move away from the Cot.
But, if you keep them in the Cot for too long, they will want to get out of that too - and it is much less safe for them to climb out of that, than it is for them to simply roll out of their bed - our son was getting out of his own cot before he was even 2!
So while it is a daunting task, it is well worth the effort to transition from cot to bed - you may have some wiggle room if they aren't yet trying to escape the cot, but if they are, it's definitely time to move.
My recommendation for this is simple - make the room itself as safe as you can. Put a child safety doorknob cover over their doorknob, remove any hard plastic or wooden toys from their room, and if you have an extra mattress or changing pad, I suggest putting it just under the bed positioned so if they do roll out, they will have a soft place to land. Keep all the outlets covered as well, of course.
Over time you will find other things that need child-proofing, and you will need to add additional child-proofing when you find those things. But in general, you can make your child's room a safe place for them to sleep, and while it may not be as safe as when they were kept in just their cot, it's the next step forward for them, and they will eventually have to take that step.