Invested in 6 companies – what’s next?

Hi guys,

About a month and a half back I figured out it's about time I begin investing since I'm 26.
Encouraged by using Revolut as my financial management instrument I bought a bunch of stocks and have driven minor analysis. Decisions that I have made are based on two factors:

1. Products that I am personally using + a lot of buzz among my millenial friends.
2. Reading charts + checking most recent news.

Within a month and a half I have built a portfolio of 6 different companies and my picks were:

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ETSY -> up 52.96% to date

BYND -> up 62.67% to date

UBER -> up 54.78% to date

HLTN -> up 14.81% to date

NPTN -> up 9.7% to date

GRPN -> down 14.07% to date

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Overall my portfolio is up 30%. How do I keep growing from that point? I really would like to make sure my portfolio is well maintained but I don't want to make it my daily obsession. I would really like to make it as passive as possible while keeping my portfolio healthy. Should I sell some of the stocks sometimes? Should I keep on investing in the ones that I currently have – if so when is the right time? How to best manage what I currently have?

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Thanks a lot in advance for your help, and wish all the best to everyone on the journey to secure their future.