[Can I get order from the forum?]

Depends on you actually. There are various types of posts and questions here. Use it to your advantage. Observe and learn from the experienced. And apply it to your area of use properly. So I'd say forum is beneficial. 

[Fake buyer]

Yes loads of them. They can be identified by their usually common approach. They will be inviting you out of Fiverr and offer an unreal sorta project. Fiverr blocks most of them quickly.

 

[Are there any fake buyers on Fiverr?]

Yes! Loads of em ! One kind you can easily recognise is by their common style of approach. They usually want to take you out of Fiverr so that easily scam you there. Because with the awesome protection of Fiverr, they can’t do scam here. So they offer you lucrative projects and ask you to contact them elsewhere. 

[Gig Impression]

Share your gigs on social media platforms and bring those clients on Fiverr. If you can generate an order, your impression is likely to increase.

 

[It have been 3 months now I have not been receiving orders]

Do proper, thorough research. Increase your skill. And push all 7 gigs to maximize your chances.