Blueberry Weizen NEED HELP!

[geologyguy]

Well a buddy of mine showed me how to all-grain brew. It's been one day and created a recipe that I want to brew in a few weeks.
I want to run it by you all since I have never made a all-grain recipe from scratch.

So I want to add some blue berry in the secondary but kinda scared. Any opinions and the amount to add?

Also i am going to mash at 150 degrees Fahrenheit for 60 minutes. Is that good?

Below is my recipe.
Thank for your time.

Style: Weizen/Weissbier
TYPE: All Grain

Recipe Specifications
--------------------------
Boil Size: 2.30 gal
Post Boil Volume: 2.08 gal
Batch Size (fermenter): 5.00 gal
Bottling Volume: 4.75 gal
Estimated OG: 1.051 SG
Estimated Color: 4.7 SRM
Estimated IBU: 19.1 IBUs
Brewhouse Efficiency: 72.00 %
Est Mash Efficiency: 72.0 %
Boil Time: 60 Minutes

Ingredients:
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Amt Name Type %/IBU

6 lbs Wheat Malt, Ger (2.0 SRM) Grain 63.2%

2 lbs 8.0 oz Pale Malt - 6 Row (Schreier) (1.8 SRM) Grain 26.3 %

1 lbs Munich Malt - 10L (10.0 SRM) Grain 10.5 %

1.00 oz Hallertauer [4.80 %] - Boil 60.0 min Hop

1.00 oz Saaz [4.00 %] - Boil 60.0 min Hop pkg

1 pkg Weihenstephan Weizen (Wyeast Labs #3068) Yeast

1.00 oz Amarillo Gold [8.50 %] - Dry Hop 6.0 Day Hop


Mash Schedule: Single Infusion, Light Body, No Mash Out
Total Grain Weight: 9 lbs 8.0 oz
----------------------------
Name Description Step Temperat Step Time
Mash In Add 11.88 qt of water at 162.5 F 150.0 F 60 min

Sparge: Fly sparge with 0.47 gal water at 168.0 F