Would a CMS be interesting for me?

Hello everyone.

I’ve done quite some reading about CMS but still I have doubt weather it would help me or make my life more difficult in the end.
Basically I’m starting a clan webpage, mostly with static content so far, but I intent to add a members only area, and do some posting per week on that. Maybe for this a CMS would help me.

On the other hand, I’m starting to create pages with buttons, checkboxes and form that, using php and mysql, communicate with a system our clan uses in Second Life (a virtual world some of us use to log in). And for that part, I’m wondering if a CMS would actually make my life more difficult.

Simple example of what I’d create for communication:

<fieldset>
<form action=“color_chosen.php” method=“POST”>
<input type=“submit” name=“color_button” value=“Red”>
<input type=“submit” name=“color_button” value=“Yellow”>
<input type=“submit” name=“color_button” value=“Blue”>
<input type=“submit” name=“color_button” value=“Green”>
<input type=“submit” name=“color_button” value=“Pink”>
<input type=“submit” name=“color_button” value=“Black”>
<input type=“submit” name=“color_button” value=“White”>
</form>
</fieldset>

The ‘color_chosen.php’ would access the database, catch the Second Life object URL stored and send the color I choose.

Very simple. But would CMS make that harder for me?
And what about creating a members only page?

Thanks!