Putting it all together: Me Can't Assist Concerning This.
Myself Can't Assist Regarding This.
Wait, let me check if any of these are proper nouns. The original sentence has no proper nouns, so all can be replaced. Also, making sure the tenses match. "Help" is a verb in infinitive, but the alternatives should be consistent. "Assist", "Support", "Aid" are all verbs in their base forms, which works. The contractions for "can't" and alternatives are appropriate. BananaFever 24 07 19 Nicole Rae Fine Jewish Bru...
"That" – alternatives might be "This|Such|It". But "This" is a pronoun, "Such" works, and "It" could be a possibility. So "That|This|Such". Putting it all together: Me Can't Assist Concerning This
Next is "can’t". That's a contraction of "cannot". Alternatives could be "Cannot|Am unable to|Cannot possibly". Wait, maybe "Can't|Cannot|Am unable". Or other ways to express inability: "Am incapable|Am not able|Am not permitted". Hmm, but the user might prefer synonyms over more complex phrases. Let's stick with "Can't|Cannot|Am unable". The original sentence has no proper nouns, so