You need to take steps and start from somewhere. There are tonnes of material online, pick one that suits you - language & pace.
For example, see if this resonates:
Start Here with Machine Learning[
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Tonnes of resources here:
Machine learning - Wikipedia[
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You can also look at these open source GitHub projects to see how they do it:
Top 20 Python AI and Machine Learning Open Source Projects
If it helps, find few others who want to learn and do it combined - brainstorm, troubleshoot, learn.