If you want to know how to invest in ICO, then you can visit this link: https://www.coindesk.com/the-ultimate-list-of-resources-for-researching-and-launching-icos/. It lists website that can help you understand more about the projects and ICO.

If you want to know how to purchase ICO, then you can visit this link: https://cointelegraph.com/ico-101/how-to-buy-ico-tokens-beginners-guide#trade-tokens.