[ Looking for some advice] Google first page ranking issue

My website is ranked in google 1st place for following keyword due to the fact my website meta title is the same as that long tail keyword

Keyword in google 1st - buy super cheap xxx xxx

The main keyword i want to rank is following

Buy cheap xxxxx

What's the best way to achieve this? If i change the meta title to "buy cheap xxxx", will that mess up everything ?

Bro my advice is to build links with optimized anchor text & it will rank in time.
My other advice is don't be afraid of trying new things. If you want to change your meta title, just do it. If it doesn't work or things got messed up, revert to the previous version.

Well for sure it is easier to rank a 5 word long than a 4 word but since you are somewhat ranking in the 5 word then you are in the right direction. Just build some blog posts for that keyword and then rank it with links

Why not add links and add lsi and other keywords in it that should help in the long term