Cryptocurrencies where to start?

Hello. I would like to start investing in cryptocurrencies. Could someone help me and advise me on how to best enter this industry? Which exchange to use to buy the first cryptocurrencies? Which wallet that supports many different cryptocurrencies will be the best for a beginner and at the same time as safe as possible. Is now a good time to enter such an investment? Is it better to buy bitcoin or maybe be interested in smaller cryptocurrencies such as ethereum or chiliz? What do you think?

Thank you for all your advice and best regards. Tomek :)