You can go to Shanxi. Perhaps the tourist attractions in Shanxi are not very famous, but I think it is quite suitable for you to go alone. I went in October.
I went to Wutai Mountain first (I don't believe in Buddhism either, but Wutai Mountain is really worth visiting). I went by train, and then I took a bus up the hill at the station for about an hour. If you want to go in October, I suggest you take a thick coat. I went in early October and caught the first snow in Wutai Mountain. It's really cold on the mountain. You don't have to worship Buddha. The scenery of Wutai Mountain is actually good.
If you don't want to go to Wutai Mountain, you can go directly to Pingyao Ancient City. Take a stroll, see the ancient government offices, see the Chenghuang Temple, and taste the old vinegar in Shanxi. There is a utopian bar in Pingyao ancient city, which is especially like Dali's style. You can go in and sit down if you like.
It takes less than an hour to drive from Pingyao ancient city to Qiao's compound. I believe many people have watched TV series! Don't you want to see their scattered courtyards for yourself? I can't describe the grandeur of the jstars courtyard.
Jinci Temple in Taiyuan is a must-see. Even if you don't like the scenery here, you can worship your ancestors. This is a tourist route suitable for one person. You don't need to join a group and you can combine it at will.
If I want to go to a particularly far place alone, I will choose to join a group. For example, if you go to Yunnan, the scenic spots in Kunming, Dali, Shangri-La and Xishuangbanna are far apart, so it is difficult to walk alone. Compared with the group, it saves time and effort.
A person's relaxation is more suitable for nearby suburbs or undeveloped tourist attractions. Quiet and carefree, a person can spend a day in a daze.