Whirlwind European Tour..Critique This Itinerary

[focus42]

Planning on going to Europe for the month of June next year. First time in Europe so looking to get a small taste of each major city and get an idea of where I'd like to come back for a longer stay. Prices are for two adults assuming staying in hostels and buying groceries whenever possible. Looking for ideas on lengths of stays in each city, costs, general timeline and travel plans.

-June 1st Fly from Sfo to Dublin (roundtrip 1550.00 us) fly to amsterdam($250) arriving June 2nd in Amsterdam
-2nd,3rd,4th Amsterdam
-Overnight train to Berlin ($225)
-5th,6th Berlin
-Overnight train to Munich ($100)
-7th,8th Munich
-Overnight Train to Venice ($100)
-9th,10th,11th Venice
-12th train to Florence($75)
-12th,13th,14th,15th Florence/Sienna
-16th train to Rome($75)
-16th,17th,18th Rome
-19th Flight from Rome to Paris($260) or train if more cost effective
-19th,20th,21st,22nd in Paris
-23rd Chunnel to London($180)
-23rd,24rd,25th,26th London
-27th London to Dublin via train and ferry($75)
-27th,28th,29th Dublin
-30th Flight Home
Travel Cost $2,900 app.
Hostel+Food Cost (assuming 25 nights at $150 per night) $3,750
Misc. (including museum admission,dinner out, Wimbledon grounds pass, show tickets) $1,000
Total Trip Cost $7,650