Not recommended.
You will be much younger socially, not able to drink/party and presumably not living in Halls.
Many younger students only realise later that this was a mistake. That they don't fit in, have problems with friendships, and generally feel 'out of it'.
On a practical level there are many courses where you can't start at 16 - all staff would have to be vetted - so you do actually need to check this with the Unis.