Astrophotography of planets does not require expensive equipment. A small refractor, a colour camera capable of high frame-rate video, and a free copy of AutoStakkert will produce results that would astonish an observer from twenty years ago.
The technique is called lucky imaging. You record a video of several thousand frames; the software discards everything but the moments of best seeing; and you stack the surviving frames into a single sharper image. The atmosphere does the work for you, intermittently.
Begin with the Moon. It is forgiving of bad focus, slow trackers, and beginner mistakes. Once you can pull crisp detail from a lunar crater, planets are the next step.