also, now my weight in the network is very low compared to the previous situation when all my coins were spendable?

Hey man, this is normal.
When your coins are staking they will be un spendable until the block is confirmed on the network. once the block ( 10 coins ) has matured your coins will be spendable again

Your network rate will also be very low as you have just found a block and some of your coins age will have reset, again this is normal
Thanks Piccolo! I am such a noob, so everytime I found a block it will take a long time again before I find another block? how many coins can I mine on average a day I got like 13.5 k coins in the wallet

Everyone is a noob at some stage

if you have your 13.5 k coins in one block you will find a block more quickly. When they are split into smaller block ( this happens when you find a block ) they are less likely to find a block but at some stage you will find two blocks instead, although it will take longer.
The higher the network weight, the less likely you'll find a block too as other people are also fighting for them.