Cant create more than 100 queues.
Cant create more than 100 connection.
How can we extend it ?
You’re on the 100 scaling tier. You need to increase this - the 100 (default) tier allows 100 connections.
As Tom said.
But for lazy people like me who uses docker, I always start my new broker directly to 1000 scaling tier like this 
docker run -d -p xxxx:xxxx --shm-size=2g --env username_admin_globalaccesslevel=admin --env username_admin_password=admin –env system_scaling_maxconnectioncount=1000 --name=solace solace/solace-pubsub-standard
You can use the instructions on this thread to upgrade to 1000 connection tier.