Many ad networks frown upon any sites which do not have their own domains, but that is not a hard and fast rule. That said, however, it may be worth investing in a domain for your blog - they are only $9/year from Namecheap/Godaddy/etc and can be used on Blogger as well as any other platform you decide on in the future.
3.2k pageviews/day is a decent amount of traffic and can certainly be monetised (do note I haven't read Blogger's ToS so don;t know what their rules are on adding ads to your blog).
There are three main ways to make money from ads on your blog:
1 - Ad networks
Ad networks find the advertisers for you, serve the ads, track the impressions/clicks and rotate the ads for you in return for taking somewhere between a 20-50% cut from your ad earnings. With a domain you may struggle to get into top tier networks like Tribal Fusion, Burst Media, Casale Media, or ValueClick - but they may still be worth applying to as they offer better rates. You may find more luck with networks such as CPX Interactive, Ad Pepper or RealTech Network. Google AdSense is always a good option to try as well as they match the ads to the actual text on the page making the ads generally more targeted.
You can read my more
in depth thoughts on these CPM and CPC networks over at Adbalance
2 - Affiliate Networks (CPA/CPS)
With affiliate networks you directly choose the offers you think would be relevant to your readers - such as DVD rentals for a movie site or cookware for a recipes site, etc. You rotate the ads and send users through to the advertisers'/merchants' stores to purchase items/services/perform surveys and you will be paid for each referral.
Affiliate networks to look into would be CJ, TradeDoubler, Epic Network, and Linkshare.
3 - Sell ads directly to advertisers.
Here you find the advertisers directly and get them to pay you a set fee per thouand impressions (CPM) for the ads you serve and track for them. Setting prices can be tricky as can be influenced by your niche, brand, traffic and reader demographics, but I tend to go with the general rule that you would charge a direct advertiser double what you could make (eCPM) from AdSense or other ad network. Then if you sell out your inventory - hike the price, but if you don;t sell all your inventory - drop your price. You can easily serve/track ads using OpenX, Google DFP or OIO Publisher.
I wrote a
short guide about selling ads directly to advertisers at AdBalance
