Is participating in an artistic forum that includes Islamic, cultural, and general sections, without entering the artistic sections or listening to songs, considered impermissible (haram) or contrary to Sharia, and does it affect fasting in Ramadan?

Your participation in an Islamic or cultural forum within the Sharia-compliant scope is not forbidden, provided you adhere to the Sharia guidelines for interacting with non-mahram individuals. You should consider the benefits and harms resulting from your participation in forums associated with the aforementioned female singer. If you possess religious knowledge and engage in da'wah (preaching) activities, and you can influence the users of these forums, benefit them, and encourage them to perform acts of obedience, then this is a good thing. However, if your participation does not include warning against evil and sins, then we advise you to direct your efforts towards Islamic forums that are run by scholars and serve Islam, where they invite to good, enjoin what is right, and forbid what is wrong. It is preferable to limit yourself to da'wah forums specifically for women, if available.