Does my writing sounds natural? Please correct me 🙇🏻‍♀️
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It's been a long time to have one of my favorite soul foods. This food's name is 닭칼국수 Dak-kalguksu. I've had this for almost 20years. The restaurant's name is '다락투' in Hongdae. I trust the chef's honestly for providing clean food. The chicken stock is very deep and clean. It's not that oily. Their side dishes are always very fresh. It seems that they don't advertise themselves much. So I'm gonna sharing the location URL https://g.co/kgs/Mp1rq8 for someone who currently stays in Korea 😋 If you want to avoid crowded times then visit at 4-5pm. There were no people when I visited at that time. Big recommendation as a local resident 🍜👍🏻

Question

Answer

Hi Cathy

'does my writing SOUND natural?'

'it's been a long time to have one of my favourite...'

Based on the context, it would appear that you are describing a period of time in which you have  enjoyed Dak-kalguksu. On this basis you would say 'it's been a  long time that I have been having one of my favourite foods.' Here you are describing an activity that started in the past and continues until now.

structure

subject + have + been + 'ing

... 'so I'm gonna sharing' - 'gonna' is an informal way of saying 'going to'. Either way you would follow both of my examples with the infinitive verb

'for someone who currently stays in Korea'.. grammatically it's unclear; it sounds like you are talking a particular person who maybe you know and they generally stay there (maybe for business or fun). My guess is you mean if someone was going to visit? On this basis 'for someone who is going to stay here.

'Big recommendation as a local resident' would be better replaced by 'I very much recommend this place.'