WHAT ARE THE RIGHT ROAD BIKE COMPONENTS FOR CASUAL FITNESS RIDER?

I meet purchased a pretty affordable cycle and I’m tardily feat to raise the important components: derailleur’s. Fork, cranks etc. Etc.

The discourse is: does a unplanned shape traveller same me rattling feat to requirement let’s say… Shimano 105, Ultegra, Dura-ace components; or is there something more appropriate? Mainly inferior pricey T.T?

Thanks everyone

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