If you want to capture planets, you don't need a focal reducer. Maybe a barlow to increase magnification.
About the camera, if you have a DSLR or even a good cell phone whith adapter, you can start capturing the moon. To capture planets I think, you can try also with the cell phone. But for better quality you need at least a Zwo 120 color or similar. Don't go mono so soon. Is good but not to a beguiner (not for me also 😁) It is more sensitive but you also need expensive filters and a lot of editing work to get color images. (just my opinion).
Is even possible to capture the moon and some planets without a goto mount. But of course, if you can afford it would be mutch better, specially a equatorial mount if you also are interest to learn deep sky astrophotography.
Good luck. Clear Skys!