So you would like to become a web developer because you believe you have the necessary talents to help you in that field, only problem being that you do not know anything about becoming a successful one.
The first thing you should think of doing is to get a business proposal ready.
Write a good business proposal enough to make your clients have confidence in you.
In this proposal, state what you hope to achieve from this new profession.
Clients matter as well because if you are able to make them happy you will be successful, so, it is important as well to gather some information from them regarding what they hope to expect and with this information you can make some adjustments to your proposal.
Next step would be to make a list of things you need to have mentioned in the proposal and arrange them starting with priorities.
Do not forget to include some samples of what you consider was your best work.
If you have got some references or acknowledgments from lets say some of your previous clients, it would be best to have them included as well.
A web developer with references in most cases can be easily trusted by his clients.
Any other relevant information can also be attached.
The most important thing is to show how interested you are in web development.
Your dedication and interest should be portrayed in your business proposal.
Some clients may not have any knowledge about web languages so, try to make your proposal easy to understand and keep it as brief as you possibly can with all the important details included.
Having a persuasive proposal is what makes clients more interested in you.
Set your goals and fulfill them!