Time Series is similar to XY Series chart. The only difference is the first X axis represents a Date or Time value. The Second column represents the Y value. Similarly you can add multiple series by adding more columns to the query
select date(payment_date),sum(amount) from payment
group by date(payment_date)
order by payment_date asc
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It is super easy to create and use Dashboards Online at https://my.infocaptor.com (in the cloud)
OR
If you like to stay on ground (perfect) you can download and run dashboards on your computer or server (intranet/network etc)