How to set order to on-hold (instead of processing)

Hi
i see some other people have this problem and you recommend some server config… but mine doesnt make this very easy thing to do (its a dreampress host). is it posible in code to set all orders from mercadopago on-hold? (so it sends the “new order” email)?
ive tried some ‘hax’ on functions file but they dont work either.

thnx for your help =)

https://www.ads-software.com/plugins/woocommerce-mercadopago/