Take the Metro C (the red line) to the I. P. Pavlova station and then walk for 10 minutes. Alternatively, take a tram (7, 14, 18 and 24) to the Albertov stop.
We recommend obtaining a “Lítačka” – a public transport pass/card for use primarily on the Prague Integrated Transport network – and purchasing a one-year coupon. You can obtain the coupon as a plastic card or as an electronic coupon on a smart phone. (Unfortunately, you cannot use both).