Adobe no longer sell a perpetual licence for Photoshop.
If you want to avoid a subscription you may wish to look at Photoshop Elements
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Photoshop Elements is available in that form. It doesn't do everything that the subscription Photoshop can, but it may be enough for your purposes.
If you intend to digitally draw and paint, and you aren't interested in renting your software, then I would strongly suggest to you to download Krita, which is a free and open source paint application. And very powerful as well - arguably more so than Photoshop for drawing/painting.