So, it seems that after the Battle of Endor, the Rebel Alliance reorganized itself into the New Republic. Though outnumbered against the vast resources and navy of the shattering empire, Gallius Rax deliberately allowed victory to be achieved. While the galaxy rejoiced after Jakku and chancellor Mon Mothma began restoring order to the galaxy, remnants of the Imperial fleet began amassing in the outer rim and were eventually united into the First Order under the force sensitive Snoke.
The senate passed a military disarmament act which reduced the New Republic's military capacities. While contracts were issued for the manufacture of new advanced T-85 X-wings and the government could still field out hundreds of capital ships including star destroyers and MC85s.
The Resistance was unable to acquire many cruisers though they did manage with what they got. Their main base of operations was the MC80 Raddus and other Mon Calamari ships operational included the eco of hope and home one. A Nebulon C frigate served as their medical craft. Other than these ships and a bunkerbuster termed the Ninka, the Resistance did not have any ships of notable value. They used primarily fighters (max 50) and massive bombers of the Cobalt Squadron (around 20 bombers in 2 groups) in hit and run attacks.
The resistance was underfunded and lacked even sufficient crew to operate its navy. In The Last Jedi,
after losses in the evacuation of D'Qar, The paramilitary unit had only 400 surviving members on 4 ships when the Raddus alone needed a minimum of that number to operate fully.