While you’re looking for a radio and waiting for it to arrive, you could prepare yourself for further exploration of SSTV modes through these two apps on F-Droid:
Running both at the same time, you can encode, transmit (as audio), receive and decode on the same device (or on two devices that can hear each other). You could also feed the audio output into the radio you’re getting and transmit it over the air, or receive and decode other SSTV transmissions. When testing it over audio on local device(s), it’s always good fun to distort the images (as if they weren’t distorted enough already) by making weird noises over the audio signal, where different frequencies and amplitudes of course will result in different colors and patterns, depending on the mode etc.
If you’re into computers, you could even consider buying some SDR (Software Defined Radio) transceiver instead/too. It’s basically a radio tuner you connect through USB and encode/decode through software, so you’ll be able to encode and transmit from your devices, and to receive and apply DSP, decode digital modes, listen, record or whatever you want to do with it. Note that some (like RTL-SDR) can only receive but not transmit. I believe the HackRF does both, but it’s been a while since I looked into it, and I’ve only ever had RTL-SDR-based receivers. There’s a lot to look into here!
Btw, have you considered searching for other local or competing options instead of going straight to Amazon for a ham radio – maybe even something used that does the job? I’m pretty sure there’s plenty of used ham equipment to find on online second-hand marketplaces, ham radio groups on facebook, something related to the national member society representing your country at IARU or ask the members of some local ham radio club?
I’ll catch your SSTV transmission or something equally as cool some day, yo!
Regarding SDR, there’s a variety of software for different purposes, but some good starting points I can think of are:
Gqrx is great for receiving and listening. Other options are available.
GNU Radio was used for making Gqrx. Maybe you could make something with it too? According to themselves, it is a free & open-source software development toolkit that provides signal processing blocks to implement software radios. It can be used with readily-available low-cost external RF hardware to create software-defined radios, or without hardware in a simulation-like environment. It is widely used in research, industry, academia, government, and hobbyist environments to support both wireless communications research and real-world radio systems.
There are also other applications made for encoding and decoding various digital modes, just like the SSTV apps for Android, but I don’t remember their names right now. I remember that some of them work by decoding the demodulated audio (e.g. audio output from Gqrx or a signal from an external source) so for some of those you will probably need some audio routing software, as these are not made for the receiving or transmitting radio but just for encoding/decoding digital modes to/from audio.
Since I’ve only had receivers, I’m unsure what the coolest software for modulation and transmission is, but here’s at least something to get you started with SDR reception.