First off make your account and get 100k by doing anything from skills or anything like collecting or something. Then get 30 smithing by mining tin and copper then smelting it and repeat and keep on going up through the ores until you get 30 smithing.
Once you have 30 smithing take your 100k and yes I mean you need 100k then buy coal and iron and make sure you have double the coal in iron and yes spend all of your 100k.(buy coal for no more than 170 each and iron no more than 100 each) Now smith all the coal and iron you have into steel bars.This might take a bit of time but once you have all of the steel smelted from the coal and iron take the steel bars and note them and go to World 1, 3, 5, and if member, world 2.
Once you get into the one of those worlds take your NOTED steel bars and sell them for 550-600 each (most likely its going to be 550 but no less than that). Once you sell all of those steel bars you would have made a lot of money but first it starts aout slowly. If you only get 50 steel bars you will only make 7k shown here: EXAMPLE: I buy 100 coal for 160 each that is 16000, and I buy 50 iron for 100 each and thats 5000 so total that is 21000. I smith those all and sell for 550, the lowest you should sell. I would get 27000. Now if you had say 1k steel bars thats 2k coal for 320,000 and iron for 100,000 and you sell for 550 each or 600 each preferably, then you would get 600k or 550k and thats more than 420k, which you started with in that venture.
Thats my second guide to make loads of money and it requires some patience.
Random Info: If you mine it your self it will take a bit longer BUT will make you a ton more money. Well thats how to make money in a nutshell.