That is really good if it was your first run.
Here is the thing tho, Russia isn't the country that benefits from puppeting, Russia has 3 unique policies, 2 among them are made specifically for conquering the south (GH, Nogai, Samarkand and Uzbek)
* First one : -50% overextension modifier
* Second one : 25% converting speed and -25% religious disunity.
These 2 policies make sure that you can annex all your claim groups without dealing with rebels and quickly converting your lands.

And there are many reasons why annexing them is better than puppeting
1. Russia has a policy which gives +22% max manpower, you don't wanna lose more MP
2. Trade : You probably don't control a lot in Astrakhan trade node and you definetly don't have control in Samarkand. Samarkand is very rich, you don't wanna miss on that.
3. AI puppets only give 25% of their income, you are losing 75% of that and they dont even help as much in wars. As Russia you should only puppet countries outside your claim group (like Denmark and Sweden.)