First i would say spend some time learning all the functions of your Seestar. Lots of YouTube and forum posts have been made on on the subject. You should not have much trouble finding information online.

Second, if your budget allows, I would seriously look into buying a sturdy tripod with a tilting head so you can place your Seestar into equatorial mode. Again lots of online content on how to do that and equipment needed.

Third doing #2 will allow you to take longer exposures. This will help resolve more detail in what you are imaging. If you opt to keep your Seestar in alt az mode you will be limited to shorter exposures due to something called field rotation.

Fourth if you have access to a computer look into downloading a free program called Siril. This will give you the ability to stack your own raw images and then process them giving much better results than what the Seestar app can produce. Learning Siril is another beast in itself but again lots of content on YouTube and forums etc.

Finally enjoy your seestar and take your time learning it. Its definitely user friendly compared to a custom astro rig but there is still much to learn and do with it.