I played solo for a while, it worked fine. I was able to complete nightfalls, weeklys but not the raids which was severely stunting my characters growth. Shortly after, I realized it was a fleeting effort and picked up the Recruitment section. It has never taken longer than 30 minutes to find a fire team for me and that is stretching the time tables. My suggestion would be to buck up and roll with it, I didn't want to play with others because I've never had luck. But, it makes it so much easier and you'll meet people that are willing to help you with whatever you may or may not need. I had 2 randoms join me the other day and helped me complete the Xyor section of Thorn when I had planned on soloing it.