Need help with vba codes for Excel 2010 Userform Combobox, ListBox, TextBox and Commands

[AliCain]

I want to create an Excel Userform interface but don't have much knowledge in excel vba. The customized userform will have the following;

-ComboBox1 Drop Down List- Displays Teams (Eg: Team1, Team2, Team2 and Team4)
-ComboBox2 Drop Down List - Displays Month (Formated to display like 04 April, 05 May, 06 June and so on...)
-ListBox1 - Displays Team members when a Team is selected in ComboBox1 drop down list and allows multiple selections
-ListBox2 - Displays Tasks/Projects for the Teams and this also allows for multiple selections

Note: The items selected in ListBoxes 1 & 2 will be added to a cell each so a cell needs to allow for multiple entries. Eg, if I have to select John, Peter and Simon from the ListBox1 then in the added cell it will display in the format below;
John
Peter
Simon

-TextBox1 - User will enter numerical values, point scored by a team member
-TextBox2 - This will calculate the total points scored by a team member (Note also that a team member will be assigned to one or more projects/tasks or vise versa, a project/task will be assigned to one or more team member)
-TextBox3 - Will display a Grand Total of points scored by a member - automatically calculates values in Textboxes 1&2
-TextBox4 - Is a comment box for the user to add comment

CommandButton1 - When click on it adds entered data to the Database Spreadsheet
CommandButton2 - Closes to UserForm

I have formatted the excel worksheet with all the required fields and data including the UserForm interface design but I only need help to code it.

I thanks in advance in this regard!