Close charts, connect your Metatrader to the broker's server, and open the chart.To select the pair/symbol: right mouse click on Market Watch - Symbols - and select the symbol and click Show button.After that - open chart with this symbol.But please note - you should have internet, and the Metatrader should be connected to the broker's server.
If you do not find some symbols on the Market Watch (on right mouse click - Symbols) - open the account with the other broker.There are a lot of brokers proposing many symbols inck stocks, and you can open demo accounts with them for few minutes using one Metatrader instance.
MetaTrader 5 Help - Open an Account
Find a Server by the Broker's Name:https://www.mql5.com/en/forum/9950/page88#comment_3981953 https://www.mql5.com/en/forum/214820
Where Do I start from?https://www.mql5.com/en/forum/212020 MetaTrader 4 Help - Client Terminal – User Guide MetaTrader 5 Help - Trading Platform — User Manual