I managed to handle an import on my own a few years back. It was a pallet of classic car spares.
It took many phone calls for assistance and several weeks to finalize everything. With sea shipping, the entire process ended up taking me about six months. The industry is not geared towards private importation, at all. Honestly, if I had to do it again, I would find the money to get professional help.
If you do plod along on your own, be ready to collect your goods as soon as you're notified. Bonded warehouse storage fees will kill you, very quickly.
Also, when collecting your goods from the bonded warehouse, they may be sticky and enforce having a reflective safety vest. Something small, but when you're metres from your goods and they don't want to allow you to collect...