Astrophoto Stacking

Hello All,
I was lucky enough to capture few pictures of the Comet C/2022 E3. But the real trouble came when i started to process those pictures and stack them. I used the tool Siril and with the help of few youtube videos i tried to stack them. But the result was not as good as expected.
I have around 30 pictures (Exp 20 sec, F5.6 and ISO 800) Can anyone guide me on how to stack those photos?

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I had the same problem. My friend and me went to mambakkam lake to take the comet photos. First strike at processing using Siril didn’t work out well. I’ve kept the files to try again later