"...these money were put off for me by my father, for me to use when I'd really need them. I don't really need this trip, although I have an incredibly strong desire to realise it."

Maybe your father can actually understand your need for a trip like this, if you can get through to him.

Maybe what you are feeling is a need for a wanderjahr (or something like it). Many fathers can relate to that and understand it. They were once young men themselves. They aren't always blind to these things; they aren't always so strange or foreign to them as it might appear at times.

Maybe you could keep your eyes open, while traveling, for ways of becoming financially independent [and you could discuss this with him -- make it clear that you are not just spending the money on a meaningless trip, but on something that is very meaningful to you, and also that while on the trip you will be looking and learning more about becoming financially independent -- and earning money on the way -- maybe that would not be (in his mind or yours) a violation of his gift to you. It would not be a misuse, but rather a good use of the money. It would not be irresponsible; it would not be a waste, but something very valuable. (It would also not be ignoring your soul or spirit, which (the ignoring of that) is itself irresponsible on another level.)

He might be able to see this, and give his blessings.].

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You can learn a lot from fellow travelers. You don't have to know or have all the answers before you leave. There are other people out there traveling. You can learn a lot from them about all kinds of things -- including equipment, ways of earning money, lodging possibilities, various ways of dealing with parents and their expectations, etc., etc. -- and sometimes the answers appear as if from nowhere, like gifts. There are unplanned events and possibilities that just appear. You don't have to plan everything.

Overplanning can be deadly.

Some degree of planning makes sense; but there comes a point where it is better to have some cajones, and deal with the unknown more boldly. Timidity sucks.

You might find that life reaches out to meet you half way.

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As far as earning money on the road: ask around; keep your eyes open. There are many ways.

A world cyclist I met earned his way through New Zealand by helping at harvest time (mainly picking apples).

If you want to check out some art and craft possibilities, there are many that can be explored. One way of seeing some of the possibilities is by Googling 'arts and crafts wiki' and then checking out specific ones, and the links.

If it appeals to you, spray paint art is one way of making some money while traveling. There are many, many others.

Most of these will not make a large amount of money; but you can make enough to stay alive and to bicycle tour. One unusual thing about bike touring is that it is (or can be) so cheap.

This means that you are not obligated to keep up with high expenses, which demands earning more money. You are (or can be) freer from the demands of money.

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These are just some possibilities I'm putting on the table.