buying google ads account

hello guys, hope you all are doing great. actually i need some information about using and buying google ads account for paid marketing. haven't any idea about risk and others i mean what i should check before buy a google ads account or fb ads account. another things is that should i use my money site link directly on those accounts? i'm asking 'coz haven't any perfect knowledge about that.

i want to buy and use google, fb, bing and others too for paid marketing.

There's no risk in advertising with these big giants you should be aware of your competitors and use those and your niche targeted or specified or your targeted keywords while setting up an account... So that you get extra edge over them as your ad will show up if there keyword is also present there... But I prefer to consult with an agency/ do ads via an agency as they are experienced and know the best...