The easiest way to build your crypto portfolio is to start buying cryptos. If you don't own any cryptos yet and you really want to become a crypto investor then you need to start investing. Don't wait for too long because you feel like the prices are too high at the moment and you want to get the cheapest possible price. My recommendation is to follow the DCA method, where you buy a constant number of crypto currencies over a longer period of time. Like this you can achieve a decent average price and don't need to worry about a short-term price fluctuation. Before that you need to decide which crypto currencies, you would like to add to your portfolio. As a complete beginner I would always start with Bitcoins, it's the OG crypto coin and should be part of any portfolio. My target for Bitcoin in my crypto portfolio is 60-80%, the rest are altcoins that I trade more fluently and change depending on the best outlooks. Trading only make sense when you have a basis to start from, I would always first try to accumulate a decent portfolio before start trading actively. The issue when you only start trading with a very small size is that you pay a lot in transaction fees and with the risk over trading your positions, it's going to be hard to generate high enough returns for your portfolio to actually grow.